Zscaler Outage History

Uptime record, past incidents, and downtime history for Zscaler.

Checking current status...
11.4% uptime over 70 days
99.9% ✗ 99.5% ✗ 99% ✗ 95% ✗

90-Day Trend

Jan 31Apr 10

Monthly Uptime

Month Uptime Days Tracked Days with Issues
April 2026 0% 10 10
March 2026 3.2% 31 30
February 2026 21.4% 28 22
January 2026 100% 1 0

Uptime is calculated from daily worst-status snapshots. A day with any non-operational status counts as a day with issues.

Daily Status (Last 70 Days)

Jan 31 Today
Operational Degraded Partial Outage Major Outage Maintenance No Data

Incident History

April 2026
Denver III (DEN3) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Apr 10, 7:36 AM

investigating
Zscaler will be performing hardware maintenance in Denver III (DEN3) Datacenter .Maintenance window:   Start: 2026-04-13 05:00 UTC   End:   2026-04-13 08:00 UTC   (Local Time 2026-04-12 23:00 - 2026-04-13 02:00)
Apr 10, 7:36 AM
Scheduled Maintenance Extended - EMEA Region - zscloud.net
major

Started: Apr 9, 11:05 PM

investigating
The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region's datacenters on zscloud.net cloud by 3 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed.Update - Fri, 10 Apr 2026 01:49:29 UTCThis activity has ...
Apr 9, 11:05 PM
China Premium Access Plus Beijing V and Shanghai VI Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Apr 9, 6:48 PM

investigating
Beijing V and Shanghai VI DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus services within these data centres may experience intermittent disconnections.Start Time: 2026-06-05 16:00:00 UTCEnd Time: 2026-06-05 20:00:00 UTC(Datacenter Local Time  2026-06-06 00:00 - 2026-06-06 04:00 China Standard Time (UTC+8:00))Reason of Maintenance: Provider advised maintenance.Impact During Maintenance: Intermittent connectivity might ...
Apr 9, 6:48 PM
Urgent Maintenance - zscalerone.net
major

Started: Apr 9, 6:41 PM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Friday at 01:00 AM Pacific Time on April 10, 2026 (Friday, April 10, 2026 08:00 AM UTC), and can take up to 4 hours to complete.During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user updat...
Apr 9, 6:41 PM
Urgent Maintenance - zdxcloud.net
major

Started: Apr 9, 6:24 PM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Thursday at 03:00 PM Pacific Time on April 9, 2026 (Thursday, April 9, 2026 10:00 PM UTC), and can take up to 2 hours to complete.During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be col...
Apr 9, 6:24 PM
Chicago I (CHI1) Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net
major

Started: Apr 9, 3:04 PM

investigating
Zscaler will be performing hardware maintenance in the Chicago I (CHI1) Datacenter.Maintenance window,Start: 2026-4-13 03:00 CDTEnd: 2026-4-13 05:00 CDT(i.e. 2026-4-13 08:00 - 10:00 UTC)No service impact is expected during this maintenance. 
Apr 9, 3:04 PM
Maintenance Window Updates - zscalerthree.net
major

Started: Apr 9, 12:58 AM

investigating
Zscaler is updating the maintenance window schedule for Oceania, APAC and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.Time (in UTC- Coordinated Universal Time)REGIONMONTUESWEDTHUFRISATSUNOceania 9:00 AM – 11:00 AM9:00 AM – 11:00 AM9:00 AM – 12:00 PM 9:00 AM – 12:00 PM Asia Pacific8:00 PM – 10:00 PM8:00 PM – 10:00 PM8:00 PM – 10:00 PM4:00 PM – 7:00 PM 1:00 PM - 4:00 PM3:00 PM – 6:00...
Apr 9, 12:58 AM
Maintenance Window Updates - zscloud.net
major

Started: Apr 9, 12:49 AM

investigating
Zscaler is updating the maintenance window schedule for Oceania, APAC and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring. Time(in UTC- Coordinated Universal Time)REGIONMONTUESWEDTHUFRISATSUNOceania 9:00 AM – 11:00 AM9:00 AM – 11:00 AM9:00 AM – 12:00 PM 9:00 AM – 12:00 PM Asia Pacific8:00 PM – 10:00 PM8:00 PM – 10:00 PM8:00 PM – 10:00 PM4:00 PM – 7:00 PM 1:00 PM - 4:00 PM3:00 PM –...
Apr 9, 12:49 AM
Maintenance Window Updates - zscalertwo.net
major

Started: Apr 9, 12:20 AM

investigating
Zscaler is updating the maintenance window schedule for Oceania, EMEA and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.Time (in UTC- Coordinated Universal Time)REGIONMONTUESWEDTHUFRISATSUNOceania 9:00 AM – 11:00 AM9:00 AM – 11:00 AM 9:00 AM – 12:00 PM9:00 AM – 12:00 PM Asia Pacific8:00 PM – 10:00 PM8:00 PM – 10:00 PM8:00 PM – 10:00 PM 4:00 PM – 7:00 PM1:00 PM -4:00 PM EMEA8:00 PM...
Apr 9, 12:20 AM
Maintenance Window Updates - zscaler.net
major

Started: Apr 8, 11:29 PM

investigating
Zscaler is updating the maintenance window schedule for Oceania, APAC, EMEA and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.Time (in UTC- Coordinated Universal Time)REGIONMONTUESWEDTHUFRISATSUNOceania 9:00 AM – 11:00 AM9:00 AM – 11:00 AM 9:00 AM – 12:00 PM9:00 AM– 12:00 PM9:00 AM– 12:00 PMAsia Pacific8:00 PM – 10:00 PM8:00 PM – 10:00 PM8:00 PM – 10:00 PM 4:00 PM – 7:00 PM1:00 PM– 4:00...
Apr 8, 11:29 PM
Maintenance Window Updates - zscalerone.net
major

Started: Apr 8, 10:37 PM

investigating
Zscaler is updating the maintenance window schedule for Oceania, EMEA and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.Time(in UTC- Coordinated Universal Time)REGIONMONTUESWEDTHUFRISATSUNOceania 9:00 AM – 11:00 AM9:00 AM – 11:00 AM 9:00 AM – 12:00 PM9:00 AM – 12:00 PM EMEA      1:00 AM– 4:00 AMAMER 6:00 AM – 8:00 AM6:00 AM – 8:00 AM6:00 AM – 8:00 AM ...
Apr 8, 10:37 PM
Delay in Processing Inbound Emails to Support Cases - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net
major

Started: Apr 8, 7:05 PM

investigating
Zscaler is aware of an issue impacting delay in processing inbound emails to support cases.Zscaler services are operating normally; delays are currently impacting the synchronization of inbound email communications related to support cases. This is due to a dependency issue with our service provider that is affecting email processing, leading to slower updates. Zscaler is actively coordinating with the service provider to restore normal functionality.Impact: During this time, customers m...
Apr 8, 7:05 PM
Scheduled Maintenance - zscaler.net
major

Started: Apr 8, 6:17 PM

investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on zscaler.net cloud. This maintenance is scheduled for Saturday at 06:00 AM Pacific Time on April 11, 2026 (Saturday, April 11, 2026 01:00 PM UTC), and can take up to 4 hours to complete.During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user up...
Apr 8, 6:17 PM
IdP-initiated Authentication Issue - zscaler.net, zscloud.net
major

Started: Apr 8, 9:35 AM

investigating
Zscaler is currently investigating reports of issues with its zscaler.net, zscloud.net Cloud. Customers using IdP-initiated authentication may experience login failures.We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Root Cause: The issue occurred due to a recently enabled feat...
Apr 8, 9:35 AM
Kolkata I (CCU1) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com
major

Started: Apr 8, 7:19 AM

investigating
Zscaler will be performing hardware maintenance in Kolkata I (CCU1) Datacenter.Maintenance window:   Start: 2026-04-14 14:30 UTC   End:   2026-04-14 17:30 UTC   (Local Time 2026-04-14 20:00 - 2026-04-14 23:00 IST)
Apr 8, 7:19 AM
London V Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net
major

Started: Apr 7, 8:53 PM

investigating
Zscaler will be enabling IPv6 at our London V (LON5) Data Center.  During the maintenance window the services through LON5 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is April 10, 2:00 pm PDT (April 10, 21:00 UTC)End time is April 10, 6:00 pm PDT (April 11, 1:00 UTC)Update 4/8: Maintenance Window Updated 
Apr 7, 8:53 PM
IdP-initiated Authentication Issue - zscaler.net, zscloud.net
major

Started: Apr 7, 3:13 PM

investigating
Zscaler is currently investigating reports of issues with its zscaler.net, zscloud.net Cloud.  Customers using IdP-initiated authentication may experience login failures.We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Root Cause - The issue occurred due to a recently enabl...
Apr 7, 3:13 PM
Munich I Datacenter Scheduled Maintenance – IPv6 Enablement - zscloud.net
major

Started: Apr 6, 7:16 PM

investigating
Zscaler will perform scheduled maintenance at our Munich I (MUC1) Data Center to complete preparatory work for future IPv6 enablement. During the maintenance window, services through the MUC1 Data Center may be restarted in phases to minimize impact.Other Zscaler sites and services will continue to operate normally.Maintenance Window:Start time is April 7, 1:00 pm PDT (April 7,  20:00 UTC)End time is April 7, 6:00 pm PDT (April 8, 1:00 UTC)Update - Tue, 07 Apr 2026 23:41:56 UTCThis activ...
Apr 6, 7:16 PM
China Premium Access Plus Beijing V and Shanghai VI Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Apr 6, 4:42 PM

investigating
Beijing V and Shanghai VI DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus services within these data centres may experience intermittent disconnections.Start Time: 2026-04-12 12:00:00 UTCEnd Time: 2026-04-12 14:00:00 UTC(Datacenter Local Time  2026-04-12 20:00 - 2026-04-12 22:00 China Standard Time (UTC+8:00))Reason of Maintenance: Provider advised maintenance.Impact During Maintenance: Intermittent connectivity might ...
Apr 6, 4:42 PM
Atlanta III (ATL3) Datacenter Network Maintenance - zscaler.net
major

Started: Apr 6, 4:11 PM

investigating
Zscaler will be performing hardware maintenance in the Atlanta III (ATL3) Datacenter.Maintenance window,Start: 2026-4-7 18:00 ESTEnd: 2026-4-7 20:00 EST(i.e. 2026-4-7 22:00 - 2026-4-8 00:00 UTC)During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.
Apr 6, 4:11 PM
Urgent Maintenance on zdxcloud.net - zdxcloud.net
major

Started: Apr 5, 6:02 AM

investigating
The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Sunday at 06:15 AM UTC on April 05, 2026, and can take up to 1 hour to complete. During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be collected and available after maintenance has completed.Update - Sun, 05 Apr ...
Apr 5, 6:02 AM
ZDX Admin Portal – Reporting and Logging Delay - zdxcloud.net
major

Started: Apr 5, 4:40 AM

investigating
Zscaler has detected an issue with the ZDX cloud. Customers may experience a temporary delay in reporting data.We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Latest Update - Mon, 06 Apr 2026 03:31:53 UTCNo issues have been observed during the monitoring period. We have applied...
Apr 5, 4:40 AM
ZDX Admin Portal – Reporting and Logging Delay - zdxcloud.net
major

Started: Apr 4, 5:31 PM

investigating
Zscaler has detected an issue impacting connectivity between client connector and ZDX cloud. Customers may experience a temporary delay in reporting data.We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Root cause: A service component within the ZDX cloud was unable to process u...
Apr 4, 5:31 PM
Private Service Edge (PSE) – Intermittent Traffic Blocking for Explicit Proxy Traffic - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Apr 4, 5:10 PM

investigating
Zscaler is aware of and actively investigating an issue impacting a subset of customers using Private Service Edge (PSE). Some customers are experiencing intermittent traffic blocking when accessing websites through PSE. Affected requests may return the error: "Web Application Blocked by Firewall Rule."We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status cha...
Apr 4, 5:10 PM
Urgent Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net
major

Started: Apr 4, 12:27 PM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Zscaler Management Portal for Partners and ZDX Admin Portal might not be available. This maintenance is scheduled for Saturday at 05:45 AM Pacific Time on April 04, 2026 (Saturday, April 04, 2026 12:45 PM UTC), and can take up to 2 hours to complete. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questi...
Apr 4, 12:27 PM
London V Datacenter Scheduled Maintenance - Service Expansion - zscaler.net
major

Started: Apr 3, 10:08 PM

investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our London V (LON5) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscaler.net/cenrMaintenance Window:Start time is April 9, 1:00 pm PDT (April 9, 20:00 UTC)End time is April 9, 6:00 pm...
Apr 3, 10:08 PM
Montreal I Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net
major

Started: Apr 3, 10:02 PM

investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Montreal I (YMQ1) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscalerthree.net/cenrMaintenance Window:Start time is April 8, 6:00 pm PDT (April 9, 1:00 UTC)End time is April 8, 1...
Apr 3, 10:02 PM
Axios Supply Chain Attack Update - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net
major

Started: Apr 3, 5:10 PM

investigating
Zscaler has analyzed the supply chain compromises affecting the Axios npm packages. Analysis confirms no impact to Zscaler platforms, products, or internal systems.As a best practice, customers should review their environments for the following impacted versions:Axios npm package versions: 1.14.1 and 0.30.4Actions if you have an impacted version:Update/Revert: Revert or pin Axios to known safe versions (e.g., 1.14.0 or 0.30.3)Rotate Credentials: Update all API keys, cloud token...
Apr 3, 5:10 PM
User Authentication Issue on Kingdom of Saudi Arabia I datacenter - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Apr 2, 11:15 AM

investigating
Zscaler has detected an issue with its Kingdom of Saudi Arabia I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal ...
Apr 2, 11:15 AM
Planned Maintenance Activity for ZPA platform service - private.zscaler.com
major

Started: Apr 2, 7:46 AM

investigating
We will be performing planned maintenance on our platform infrastructure in the Prod US region to enhance availability and resiliency.  Some customers may witness below impact during this maintenance window:Momentary disconnect and auto-reconnect of zcc.Any active session will be disconnected and logged under ZPA User Activity logs as “MT_CLOSED_TLS_CONN_GONE_SCIM_USER_MOVED”Important Note: No action is required from customers and this communication is only intended to info...
Apr 2, 7:46 AM
Upcoming New Data Centers and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
major

Started: Apr 1, 10:47 PM

investigating
Dear Zscaler Customer,In accordance with Zscaler Service Continuity Policy and per email notification sent on April 1, 2026, we would like to notify you of the upcoming new data centers and expansions at the locations listed below. These would be available anytime on or after May 31, 2026; 60 days or more from the date the first email notification is sent.Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid...
Apr 1, 10:47 PM
Scheduled Maintenance - zscalerthree.net
major

Started: Apr 1, 6:11 PM

investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on zscalerthree.net cloud. This maintenance is scheduled for Saturday at 07:00 AM Pacific Time on April 4, 2026 (Saturday, April 4, 2026 02:00 PM UTC), and can take up to 4 hours to complete.During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user...
Apr 1, 6:11 PM
Zurich I Datacenter Scheduled Maintenance - Service Expansion - zscloud.net
major

Started: Apr 1, 5:14 PM

investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Zurich I (ZRH1) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscloud.net/cenrMaintenance Window:Start time is April 2, 1:30 pm PDT (April 2, 20:30 UTC)End time is April 2, 4:30 pm...
Apr 1, 5:14 PM
Chennai II, Hyderabad I, Mumbai VI, Mumbai VII, New Delhi I Datacenter Issue - zscalerthree.net
major

Started: Apr 1, 10:36 AM

investigating
Zscaler has detected an issue with its Chennai II, Hyderabad I, Mumbai VI, Mumbai VII, New Delhi I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional det...
Apr 1, 10:36 AM
March 2026
Montreal I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 31, 11:59 PM

investigating
Zscaler will be enabling IPv6 at our Montreal I (YMQ1) Data Center.  During the maintenance window the services through YMQ1 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is April 1, 6:00 pm PDT (April 2, 1:00 UTC)End time is April 1, 11:00 pm PDT (April 2, 6:00 UTC)Update - Thu, 02 Apr 2026 04:19:00 UTCThis activity has been completed. Please contact Zscaler ...
Mar 31, 11:59 PM
Action Required — Verify/Correct Your Z-Identity IdP “Primary Email” Attribute Mapping - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net
major

Started: Mar 31, 6:45 AM

investigating
Zscaler is proactively reaching out to help prevent potential login failures to the Z-Identity Admin Console when authenticating through your Identity Provider (IdP). Based on monitoring, your tenant may be missing or mis-mapping the required Primary Email attribute used during JIT (Just-In-Time) provisioning.This advisory relates to the recent incident and follow-up corrective actions (Reference: Trust Post: Z-Identity Portal Issue).What is the issue?On Mar...
Mar 31, 6:45 AM
Administration UI and User Authentication Issues - zscalertwo.net
major

Started: Mar 31, 4:56 AM

investigating
Zscaler has detected an issue with the administration UI and user authentication on its zscalertwo.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Root Cause: The preliminary root cause of this issue is attributed to a fault in the control plane.Latest Update - ...
Mar 31, 4:56 AM
Urgent Maintenance on Mumbai VI and New Delhi I datacenters - zscalerthree.net
major

Started: Mar 30, 11:14 PM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Mumbai VI and New Delhi I datacenters on the zscalerthree.net cloud. This maintenance is scheduled for Monday at 4:30 PM Pacific Time on March 30, 2026 (Monday, March 30, 2026 11:30 PM UTC), and can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Sup...
Mar 30, 11:14 PM
Zurich I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 30, 9:54 PM

investigating
Zscaler will be enabling IPv6 at our Zurich I (ZRH1) Data Center.  During the maintenance window the services through ZRH1 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is April 1, 1:30 pm PDT (April 1, 20:30 UTC)End time is April 1, 5:30 pm PDT (April 2, 0:30 UTC)Update 3/31: Maintenance postponed
Mar 30, 9:54 PM
Customer Support Portal (CSP) Login Issues - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net
major

Started: Mar 30, 9:03 PM

investigating
Zscaler is currently investigating an issue impacting Customer Support Portal (CSP) access for a subset of customers. Affected customers may encounter the error message: “Can’t connect to Zscaler Support” when attempting to log in to the CSP.Workaround: While a fix is being implemented, customers may use the following alternative methods:If you have Administrative access to another Zscaler product (such as ZIA, ZPA, or ZDX), you can access the Support Portal through that produ...
Mar 30, 9:03 PM
São Paulo IV (SAO4) Critical Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net
major

Started: Mar 30, 7:28 PM

investigating
Zscaler will be performing critical hardware maintenance in the São Paulo IV (SAO4) Datacenter.Maintenance window,Start: 2026-4-2 18:00 GMT-3End: 2026-4-2 22:00 GMT-3(i.e. 2026-4-2 21:00 - 2026-4-3 01:00 UTC)During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.
Mar 30, 7:28 PM
Reminder Notification For New Data Center and Old CIDR Deprecation - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
major

Started: Mar 30, 6:53 PM

investigating
Dear Customer, In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on February 10, 2026, we would like to remind you of the upcoming new data center at the location listed below. This would be available anytime on or after April 11, 2026.Please update your firewall policy rules and any upstream access lists to allow the new IP address ranges to avoid any service disruption.RegionLocationCIDRNotesAm...
Mar 30, 6:53 PM
ZIA Platform Alerts – Email Notifications Not Being Delivered - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 27, 9:26 PM

investigating
Zscaler is investigating an issue impacting email notifications for Platform Alerts configured within the ZIA Admin Portal (Under Administration > Define Alerts Page > Alerts). Customers may not be receiving email notifications for alert-triggering events. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be ...
Mar 27, 9:26 PM
Planned Maintenance Activity for ZPA authentication service - private.zscaler.com
major

Started: Mar 27, 11:04 AM

investigating
We will be performing planned maintenance on our ZPA authentication platform infrastructure to enhance availability and resiliency. Customers may witness authentication issue while login to Admin UI or Public API during this maintenance window.Important Note: No action is required from customers and this communication is only intended to inform in advance.Please reach out to support if you have any questions or require further clarification.Update - Sat, 28 Mar 2026 03:34:33 UTCThis activity ...
Mar 27, 11:04 AM
Urgent Maintenance - zscalertwo.net
major

Started: Mar 27, 5:15 AM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalertwo.net cloud. This maintenance is scheduled for Thursday at 10:30 PM Pacific Time on March 26, 2026 (Friday, March 27, 2026 05:30 AM UTC), and can take up to 30 minutes to complete.During the maintenance, the ZIA Admin Portal, and access to policy management will not be available. A brief impact to new user authentication might occur. However, all the logs that are collected during this period wi...
Mar 27, 5:15 AM
Experience Center – SSO Error When Accessing Support Tab - zslogin.net
major

Started: Mar 27, 12:53 AM

investigating
Zscaler is investigating an issue impacting Experience Center customers, where users may encounter an SSO error when navigating to the Support tab within the Experience Portal.Impact: Customers attempting to access the Support tab through the Experience Center portal may be unable to successfully authenticate via SSO. All other platform functionalities remain unaffected.Workaround:Customers can continue to access the Support Portal using the following validated workaround:Log in to an alterna...
Mar 27, 12:53 AM
China Premium Access Plus Shanghai Datacenter (Shanghai VI) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 26, 10:06 PM

investigating
Shanghai VI DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus services within these data centres may experience intermittent disconnections.Start Time: 2026-04-08 14:00:00 UTCEnd Time: 2026-04-08 15:00:00 UTC(Datacenter Local Time  2026-04-08 22:00 - 2026-04-08 23:00 China Standard Time (UTC+8:00))Reason of Maintenance: Provider advised maintenance.Impact During Maintenance: Intermittent connectivity might be observed du...
Mar 26, 10:06 PM
Upcoming Extranet Virtual IP Address Announcement - zscloud.net
major

Started: Mar 26, 9:55 PM

investigating
Dear Zscaler Customer,In accordance with Zscaler Service Continuity Policy and per email notification sent on March 26, 2026, we would like to notify you of the new Virtual IP addresses (VIPs) for the Zscaler Extranet Application Support rollout.These new Extranet  VIPs can be used to terminate IPSec VPN tunnels with Extranet connectivity at the locations listed below. The VIPs will be displayed on the Zscaler Config page for ease of access and visibility.&n...
Mar 26, 9:55 PM
Upcoming Extranet Virtual IP Address Announcement - zscalerthree.net
major

Started: Mar 26, 9:49 PM

investigating
Dear Zscaler Customer,In accordance with Zscaler Service Continuity Policy and per email notification sent on March 26, 2026, we would like to notify you of the new Virtual IP addresses (VIPs) for the Zscaler Extranet Application Support rollout.These new Extranet VIPs can be used to terminate IPSec VPN tunnels with Extranet connectivity at the locations listed below. The VIPs will be displayed on the Zscaler Config page for ease of access and visibility. Us...
Mar 26, 9:49 PM
Upcoming Extranet Virtual IP Address Announcement - zscalertwo.net
major

Started: Mar 26, 9:43 PM

investigating
Dear Zscaler Customer,In accordance with Zscaler Service Continuity Policy and per email notification sent on March 26, 2026, we would like to notify you of the new Virtual IP addresses (VIPs) for the Zscaler Extranet Application Support rollout.These new Extranet VIPs can be used to terminate IPSec VPN tunnels with Extranet connectivity at the locations listed below. The VIPs will be displayed on the Zscaler Config page for ease of access and visibility. Us...
Mar 26, 9:43 PM
Upcoming Extranet Virtual IP Address Announcement - zscaler.net
major

Started: Mar 26, 9:37 PM

investigating
Dear Zscaler Customer,In accordance with Zscaler Service Continuity Policy and per email notification sent on March 26, 2026, we would like to notify you of the new Virtual IP addresses (VIPs) for the Zscaler Extranet Application Support rollout.These new Extranet VIPs addresses can be used to terminate IPSec VPN tunnels with Extranet connectivity at the locations listed below. The VIPs will be displayed on the Zscaler Config page for ease of access and visibilit...
Mar 26, 9:37 PM
Trivy and LiteLLM Supply Chain Incident (CVE-2026-33634) Update - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net
major

Started: Mar 26, 9:18 PM

investigating
Zscaler has analyzed the supply chain compromises affecting the Trivy security scanner and LiteLLM. Analysis confirms no impact to Zscaler platforms, products, or internal systems, including AI Guard.As a best practice customers should review their environments for the following impacted versions:Trivy: Container images v0.69.5–v0.69.6LiteLLM: Versions 1.82.7 and 1.82.8.Actions if you have an impacted version:Update/Revert: Upgrade Trivy to v0.69.7 or late...
Mar 26, 9:18 PM
Frankfurt VI Datacenter Scheduled Maintenance - zscaler.net
major

Started: Mar 26, 6:59 PM

investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Frankfurt VI (FRA6) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscaler.net/cenrMaintenance Window:Start time is March 27, 3:00 pm PDT (March 27, 22:00 UTC)End time is  Marc...
Mar 26, 6:59 PM
Planned Maintenance Activity for ZPA platform service - private.zscaler.com
major

Started: Mar 26, 7:44 AM

investigating
We will be performing planned maintenance on our platform infrastructure in the Prod US region to enhance availability and resiliency.  Some customers may witness below impact during this maintenance window:Momentary disconnect and auto-reconnect of zcc.Any active session will be disconnected and logged under ZPA User Activity logs as “MT_CLOSED_TLS_CONN_GONE_SCIM_USER_MOVED”Important Note: No action is required from customers and this communication is only intended to info...
Mar 26, 7:44 AM
Cloud Browser Isolation issue for Frankfurt Region - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com
major

Started: Mar 25, 2:27 PM

investigating
Zscaler has identified an issue with Cloud Browser Isolation (CBI) impacting customers in Frankfurt Region. Affected customers may experience issue with new isolation session for Frankfurt region.We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Update - Wed, 25 Mar 2026 14:36:16...
Mar 25, 2:27 PM
Oslo III Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 25, 1:06 PM

investigating
Zscaler has detected an issue with its Oslo III datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status cha...
Mar 25, 1:06 PM
Urgent Oslo III (OSL3) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com
major

Started: Mar 25, 10:49 AM

investigating
Zscaler will be performing hardware maintenance in the Oslo III (OSL3) Datacenter.Maintenance window,Start: 2026-03-25 13:00 CESTEnd: 2026-03-25 16:00 CEST(i.e. 2026-03-25 12:00 - 2026-03-25 15:00 UTC)Update - Wed, 25 Mar 2026 13:58:57 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Mar 25, 10:49 AM
Mumbai VI (BOM6) Datacenter Network Maintenance - zscaler.net
major

Started: Mar 25, 8:52 AM

investigating
Zscaler will be performing hardware maintenance in Mumbai VI (BOM6) Datacenter .Maintenance window:   Start: 2026-03-27 12:30 UTC   End:   2026-03-27 14:30 UTC   (Local Time 2026-03-27 18:00 - 2026-03-27 20:00 IST)
Mar 25, 8:52 AM
Los Angeles I Datacenter Scheduled Maintenance - zscalertwo.net
major

Started: Mar 25, 7:22 AM

investigating
Zscaler will be performing hardware maintenance in Los Angeles I (QLA1) Datacenter.Maintenance window:   Start: 2026-03-26 02:00 UTC   End:   2026-03-26 04:00 UTC   (Local Time 2026-03-25 19:00 - 2026-03-25  21:00)Update - Thu, 26 Mar 2026 03:59:14 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Mar 25, 7:22 AM
Reminder Notification for Upcoming Data Center Expansion - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
major

Started: Mar 23, 7:11 PM

investigating
Dear Customer, In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on February 4, 2026, we would like to remind you of the upcoming data center expansion at the location listed below. These would be effective anytime on or after April 5, 2026.Please update your firewall policy rules and any upstream access control lists to allow the new IP address ranges to avoid any service disruption.RegionLocationCID...
Mar 23, 7:11 PM
Reminder Notification for Additions of HUB IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net
major

Started: Mar 23, 6:56 PM

investigating
Dear Customer, In accordance with Zscaler Service Continuity Policy and as previously announced via Trust and email notification sent on February 4, 2026, we would like to remind you of the upcoming changes to HUB IP address ranges as listed below. The services through the new IP address range will be available anytime on or after April 5, 2026.CIDRNotes205.220.118.0/23New addition to Required Hub IP addresses101.2.244.0/23New addition to Required Hub I...
Mar 23, 6:56 PM
Abu Dhabi I and Dubai II Data Center Issue - zscloud.net
major

Started: Mar 23, 6:31 AM

investigating
Zscaler has detected an issue with its Abu Dhabi I and Dubai II datacenter on the zcloud.net cloud and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler c...
Mar 23, 6:31 AM
Dubai I Data Center Issue - zscloud.net
major

Started: Mar 23, 5:50 AM

investigating
Zscaler has detected an issue with its Dubai I datacenter on zscloud.net and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CS...
Mar 23, 5:50 AM
Canberra I Data Center Issue - zscalerthree.net
major

Started: Mar 23, 4:47 AM

investigating
Zscaler has detected an issue with its Canberra I datacenter on the zscalerthree.net cloud and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer ...
Mar 23, 4:47 AM
San Francisco IV (SJC4) Datacenter Network Maintenance - zscalertwo.net, zscalerthree.net
major

Started: Mar 23, 2:01 AM

investigating
Zscaler will be performing hardware maintenance in San Francisco IV (SJC4) Datacenter.Maintenance window:   Start:  2026-03-25 03:30 UTC   End:    2026-03-25 06:30 UTC   (Local Time 2026-03-24 20:30 - 2026-03-24 23:30)Update - Wed, 25 Mar 2026 04:00:53 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Mar 23, 2:01 AM
ZIdentity Portal Issue - zslogin.net
major

Started: Mar 21, 11:35 AM

investigating
Zscaler is investigating an issue with the ZIdentity Portal on the zslogin.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Root cause- The issue occurred due to a recent service update.Update - Sat, 21 Mar 2026 12:10:56 UTCThe Zscaler team has identified the root cau...
Mar 21, 11:35 AM
Capetown IV Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 21, 11:12 AM

investigating
Zscaler has detected an issue with our Capetown IV datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status ...
Mar 21, 11:12 AM
CBI Original URL Experience Degradation - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 20, 9:17 PM

investigating
Zscaler is actively implementing mitigation measures for an intermittent, low-impact issue affecting the Zscaler Internet Access (ZIA) Service Edge.  As part of our troubleshooting and remediation process, we are making adjustments to a specific feature indicated by our data to be triggering the issue.  As a result, some Cloud Browser Isolation (CBI) customers who have enabled the newly released Original URL feature in their Isolation Profile may periodically still see the full...
Mar 20, 9:17 PM
Rio de Janeiro I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 20, 6:52 PM

investigating
Zscaler will be enabling IPv6 at our Rio de Janeiro I (RIO1) Data Center.  During the maintenance window the services through RIO1 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is March 23, 2:00 pm PST (March 23, 21:00 UTC)End time is March 23, 7:00 pm PST (March 24, 2:00 UTC)Update 3/23: Maintenance Postponed
Mar 20, 6:52 PM
Atlanta III Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net
major

Started: Mar 20, 6:44 PM

investigating
Zscaler will be enabling IPv6 at our Atlanta III (ATL3) Data Center.  During the maintenance window the services through ATL3 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is March 23, 6:00 pm PST (March 24, 1:00 UTC)End time is March 23, 11:00 pm PST (March 24, 6:00 UTC)
Mar 20, 6:44 PM
Urgent Maintenance - zscaler.net
major

Started: Mar 20, 4:37 PM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Atlanta II, Atlanta III, Los Angeles, Los Angeles II datacenter on the zscaler.net cloud. This maintenance can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.Update - Fri, 20 Mar 2026 18:06:31 UTCThis activit...
Mar 20, 4:37 PM
Urgent Maintenance on Dusseldorf 1 and Frankfurt 6 datacenters - zscaler.net
major

Started: Mar 20, 6:09 AM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Dusseldorf 1 and Frankfurt 6 datacenters on the zscaler.net cloud. This maintenance is scheduled for Thursday at 11:30 PM Pacific Time on March 19, 2026 (Friday, March 20, 2026 6:30 AM UTC), and can take up to 1 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Sup...
Mar 20, 6:09 AM
Urgent Maintenance - AMER Region - zscalertwo.net
major

Started: Mar 20, 12:26 AM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the AMER region's datacenters of zscalertwo.net cloud. This maintenance is scheduled for Thursday at 9:00 PM Pacific Time on Mar 19, 2026 (Friday, Mar 20, 2026 4:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have addi...
Mar 20, 12:26 AM
Urgent Maintenance on New York 3 and 4 datacenters - zscaler.net
major

Started: Mar 19, 8:01 AM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the New York 3 and 4 datacenter on the zscaler.net cloud. This maintenance is scheduled for Thursday at 1:30 AM Pacific Time on March 19, 2026 (Thursday, March 19, 2026 8:30 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you ...
Mar 19, 8:01 AM
User Authentication Issue on Sao Paulo II - zscaler.net, zscalertwo.net, zscloud.net
major

Started: Mar 19, 4:47 AM

investigating
Zscaler has detected an issue with its Sao Paulo II datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status...
Mar 19, 4:47 AM
Planned Maintenance Activity for ZPA authentication service - private.zscaler.com
major

Started: Mar 19, 4:43 AM

investigating
We will be performing planned maintenance on our ZPA authentication platform infrastructure to enhance availability and resiliency.  Some customers may witness below impact during this maintenance window:Brief retries or elevated latency for new auth requests might be seen during connection re‑establishment.Transient errors during auth is possible; retry should succeed.Important Note: No action is required from customers and this communication is only intended to inform in advance.Plea...
Mar 19, 4:43 AM
Sydney V Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 18, 9:28 PM

investigating
Dear Zscaler Customer,You are receiving this notice in accordance with the Zscaler Service Continuity Policy.As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler will be bringing online a new Sydney V (SYD5) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on March 19, 2026What if I have more questions? Contact Zscaler Support via the “Support” link at the top-right of the Zscaler...
Mar 18, 9:28 PM
Zscaler Client Connector (ZCC) Authentication Issues - zscalerone.net
major

Started: Mar 18, 7:32 PM

investigating
Zscaler is aware and investigating reports on an issue with ZCC Network errors on its zscalerone.net Cloud. Affected users may experience 'network connection failed' errors when attempting to log into Zscaler Client Connector (ZCC). Users who are already logged in can access services normally.We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and a...
Mar 18, 7:32 PM
Planned Maintenance Activity for ZPA platform service - private.zscaler.com
major

Started: Mar 18, 10:33 AM

investigating
We will be performing planned maintenance on our platform infrastructure in the Prod US region to enhance availability and resiliency.  Some customers may witness below impact during this maintenance window:Momentary disconnect and auto-reconnect of zcc.Any active session will be disconnected and logged under ZPA User Activity logs as “MT_CLOSED_TLS_CONN_GONE_SCIM_USER_MOVED”Important Note: No action is required from customers and this communication is only intended to info...
Mar 18, 10:33 AM
San Francisco IV (SJC4) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com
major

Started: Mar 17, 6:34 PM

investigating
Zscaler will be performing hardware maintenance in San Francisco IV (SJC4) Datacenter.Maintenance window:   Start: 2026-03-19 06:00 UTC   End:   2026-03-19 14:00 UTC   (Local Time 2026-03-18 23:00 - 2026-03-19 07:00)Update - Thu, 19 Mar 2026 11:59:25 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Mar 17, 6:34 PM
SaaS Application Activity Data Not Displaying in Activity Logs - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 16, 9:54 PM

investigating
Activity Logs are currently not displaying SaaS application activity data. Zscaler is actively working to resolve this issue.Who is impacted?ZIA customers who have onboarded and configured Data-at-Rest scanning for SaaS applications may temporarily be unable to view SaaS-related activity data in Activity Logs.When will this be resolved?A fix is currently being deployed and is expected to be completed across all Zscaler clouds by March 22, 2026.What are my next steps?No action is required from...
Mar 16, 9:54 PM
Deprecation of Individual Administrative UIs - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, zslogin.net
major

Started: Mar 16, 6:33 PM

investigating
What is changing?Zscaler is deprecating individual administrative User Interfaces (UIs). Customers must migrate to ZIdentity and Experience Center, Zscaler’s centralized administrative and insights platform, to take advantage of new features and innovations.Who is impacted?All customers not currently using ZIdentity for administrative purposes must complete the migration to have access to new features and innovations.Key InformationAccess Experience Center: To use the latest administrative ...
Mar 16, 6:33 PM
Zscaler Microsegmentation Log Forwarding Issue - private.zscaler.com
major

Started: Mar 16, 5:24 PM

investigating
Zscaler is investigating an issue with the Zscaler Microegmentation's log forwarding service via Log Streaming Service (LSS) on its private.zscaler.com cloud. The logs forwarding via LSS is temporarily disabled. This does not impact the core Microsegmentation functionality and all the logs will continue to be visible in the Administration UI.We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler c...
Mar 16, 5:24 PM
Sitereview Portal Validation Update - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net
major

Started: Mar 16, 2:10 PM

investigating
Site review is used by customers and their users to submit URL categorization and review requests to Zscaler. To provide a more secure environment for our ZIA customers, Zscaler is refining how the Site review portal authorizes URL recategorization and review requests. Previously, the portal accepted requests if either the Source IP or the X Forwarded For header belonged to a Zscaler IP address range. As part of a security enhancement, we are removing reliance on the X Forwarde...
Mar 16, 2:10 PM
Zscaler Client Connector Portal Issue - zscaler.net, zscloud.net, zscalerthree.net
major

Started: Mar 16, 7:23 AM

investigating
Zscaler has detected an issue with Zscaler Client Connector Portal Issue on its zscalerthree.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Root cause- The issue was caused by a software defect introduced during a recent system update.Latest Update - Mon, 16 Mar 202...
Mar 16, 7:23 AM
Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.zsdpc.net
major

Started: Mar 16, 4:06 AM

investigating
Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on March 16th, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes. Update - Mon, 16 Mar 2026 05:52:18 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Mar 16, 4:06 AM
Urgent Maintenance - VZEN nodes - zscalertwo.net
major

Started: Mar 15, 1:33 AM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the VZEN nodes in zscalertwo.net cloud. The maintenance will happen across VZEN nodes during the window, beginning at 06:30 PM Pacific Time on Saturday, March 14, 2026 (Sunday, March 15, 2026 01:30 AM UTC) and continuing for up to 5 hours. VZEN's services will be restarted as part of this change and service for your end users might be disrupted during the window. All logs will be collected and available ...
Mar 15, 1:33 AM
Urgent Maintenance on Zurich datacenter - zscloud.net
major

Started: Mar 14, 4:54 PM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Zurich datacenter on the zscloud.net cloud. This maintenance is scheduled for Saturday at 1:00 PM Pacific Time on March 14, 2026 (Saturday, March 14, 2026 8:00 PM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have addit...
Mar 14, 4:54 PM
Zscaler Client Connector-Based End User Notifications Issue - zscaler.net
major

Started: Mar 14, 5:59 AM

investigating
Zscaler has detected an issue with Zscaler Client Connector-Based End User Notifications on its zscaler.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Resolved-  Issue was related to node.Update - Sat, 14 Mar 2026 06:52:20 UTCZscaler has implemented mitiga...
Mar 14, 5:59 AM
Scheduled Maintenance Extended - zscaler.net
major

Started: Mar 14, 5:45 AM

investigating
The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscaler.net cloud by 2 hour. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.Update - Sat, 14 Mar 2026 08:00:18 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Mar 14, 5:45 AM
Dubai I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net
major

Started: Mar 14, 1:30 AM

investigating
Zscaler will be enabling IPv6 at our Dubai I  (DXB1) Data Center.  During the maintenance window the services through DXB1 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is March 19, 9:00 am PST (March 19, 16:00 UTC)End time is March 19, 3:00 pm PST (March 19, 22:00 UTC)
Mar 14, 1:30 AM
Dubai I Datacenter Scheduled Maintenance - zscloud.net
major

Started: Mar 14, 1:27 AM

investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Dubai I (DXB1) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscloud.net/cenrMaintenance Window:Start time is March 19, 9:00 am PST (March 19, 16:00 UTC)End time is March 19, 3:00 ...
Mar 14, 1:27 AM
Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
major

Started: Mar 14, 12:04 AM

investigating
Dear Zscaler Customer,In accordance with Zscaler Service Continuity Policy and per email notification sent on March 13, 2026, we would like to notify you of the upcoming data center expansions at the locations listed below. These would be available anytime on or after May 12, 2026; 60 days or more from the date the first email notification is sent.Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any ser...
Mar 14, 12:04 AM
Singapore IV Datacenter Scheduled Maintenance - zscaler.net, zscloud.net
major

Started: Mar 13, 8:53 PM

investigating
Zscaler will be enabling IPv6 at our Singapore IV (SIN4) Data Center.  During the maintenance window the services through SIN4 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is March 18, 9:00 am PST (March 18, 16:00 UTC)End time is March 18, 3:00 pm PST (March 18, 22:00 UTC)
Mar 13, 8:53 PM
Manchester I Datacenter Scheduled Maintenance - zscalertwo.net
major

Started: Mar 13, 5:24 PM

investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Manchester I (MAN1) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscalertwo.net/cenrMaintenance Window:Start time is March 18, 11:00 am PST (March 18, 18:00 UTC)End time is March ...
Mar 13, 5:24 PM
Manchester I Datacenter Scheduled Maintenance - zscalertwo.net
major

Started: Mar 13, 5:22 PM

investigating
Zscaler will be enabling IPv6 at our Manchester I (MAN1) Data Center.  During the maintenance window the services through MAN1 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is March 18, 11:00 am PST (March 18, 18:00 UTC)End time is March 18, 4:00 pm PST (March 18, 23:00 UTC)
Mar 13, 5:22 PM
Vienna I Datacenter Scheduled Maintenance - zscloud.net, zscalerthree.net
major

Started: Mar 13, 5:06 PM

investigating
Zscaler will be enabling IPv6 at our Vienna I (VIE1) Data Center.  During the maintenance window the services through VIE1 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is March 16, 1:00 pm PST (March 16, 8:00 UTC)End time is March 16, 7:00 pm PST (March 17, 2:00 UTC)
Mar 13, 5:06 PM
Manchester I Datacenter Scheduled Maintenance - zscloud.net
major

Started: Mar 13, 4:56 PM

investigating
Zscaler will be enabling IPv6 at our Manchester I (MAN1) Data Center.  During the maintenance window the services through MAN1 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is March 17, 11:00 am PST (March 17, 18:00 UTC)End time is March 17, 4:00 pm PST (March 17, 23:00 UTC)
Mar 13, 4:56 PM
Manchester I Datacenter Scheduled Maintenance - zscloud.net
major

Started: Mar 13, 4:54 PM

investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Manchester I (MAN1) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscloud.net/cenrMaintenance Window:Start time is March 17, 11:00 am PST (March 17, 18:00 UTC)End time is March 17,...
Mar 13, 4:54 PM
Taipei II Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net
major

Started: Mar 13, 4:43 PM

investigating
Zscaler will be enabling IPv6 at our Taipei II (TPE2) Data Center.  During the maintenance window the services through TPE2 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is March 17, 9:00 am PST (March 17, 16:00 UTC)End time is March 17, 2:00 pm PST (March 17, 21:00 UTC)
Mar 13, 4:43 PM
Taipei II Datacenter Scheduled Maintenance - zscloud.net
major

Started: Mar 13, 4:41 PM

investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Taipei II (TPE2) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscloud.net/cenrMaintenance Window:Start time is March 17, 9:00 am PST (March 17, 16:00 UTC)End time is March 17, 2:0...
Mar 13, 4:41 PM
Commercial Salesforce Security Notification - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net
major

Started: Mar 13, 4:29 PM

investigating
On March 10, 2026, Zscaler was made aware of a campaign targeted at the Salesforce Experience Center impacting a large number of Salesforce customers, including Zscaler. Following guidance from Salesforce, Zscaler completed remediation of the incident on March 11, 2026.Unauthorized access to personal data was limited to the Name and Email Address field from the Commercial Zscaler Community Portal. The scope of the incident was confined to the Zscaler Commercial Salesforce tenant and...
Mar 13, 4:29 PM
Paris IV Datacenter Scheduled Maintenance - zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 13, 4:17 PM

investigating
Zscaler will be enabling IPv6 at our Paris IV (PAR4) Data Center.  During the maintenance window the services through PAR4 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is March 16, 10:00 am PST (March 16, 17:00 UTC)End time is March 16, 3:00 pm PST (March 16, 22:00 UTC)
Mar 13, 4:17 PM
Oslo III Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 13, 12:36 PM

investigating
Zscaler has detected an issue with our Oslo III datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status cha...
Mar 13, 12:36 PM
Zscaler Client Connector-Based End User Notifications Issue - zscaler.net
major

Started: Mar 13, 11:44 AM

investigating
Zscaler has detected an issue with Zscaler Client Connector-Based End User Notifications on its zscaler.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Resolved-  Issue was related to node.Update - Fri, 13 Mar 2026 12:16:51 UTCFollowing the actions previous...
Mar 13, 11:44 AM
Urgent Maintenance on Los Angeles, Los Angeles II, Seattle, San Francisco IV, and Denver III datacenters - zscalertwo.net
major

Started: Mar 12, 11:01 PM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Los Angeles, Los Angeles II, Seattle, San Francisco IV, and Denver III datacenters on the zscalertwo.net cloud. This maintenance is scheduled for Thursday at 11:00 PM Pacific Time on Mar 12, 2026 (Friday, Mar 13, 2026 06:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenan...
Mar 12, 11:01 PM
Urgent Maintenance on Atlanta II, Atlanta III, Washington DC, Washington DC IV, Miami III, and Boston I datacenters - zscalertwo.net
major

Started: Mar 12, 10:41 PM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Atlanta II, Atlanta III, Washington DC, Washington DC IV, Miami III, and Boston I datacenters on the zscalertwo.net cloud. This maintenance is scheduled for Thursday at 5:00 PM Pacific Time on Mar 12, 2026 (Friday, Mar 13, 2026 12:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after...
Mar 12, 10:41 PM
Planned Maintenance Activity for ZPA authentication service - zpatwo.net
major

Started: Mar 12, 11:58 AM

investigating
We will be performing planned maintenance on our ZPA authentication platform infrastructure to enhance availability and resiliency.  Some customers may witness below impact during this maintenance window:Brief retries or elevated latency for new auth requests might be seen during connection re‑establishment.Transient errors during auth is possible; retry should succeed.Important Note: No action is required from customers and this communication is only intended to inform in ad...
Mar 12, 11:58 AM
Administration UI and User Authentication Issues - zscaler.net
major

Started: Mar 12, 9:12 AM

investigating
Zscaler has detected an issue with the administration UI and user authentication on its zscaler.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Root Cause: A Central Authority (CA) issue triggered a CA re-election.Latest Update - Thu, 12 Mar 2026 12:22:02 UTCFol...
Mar 12, 9:12 AM
Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.eu.zsdpc.net
major

Started: Mar 12, 3:57 AM

investigating
Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on March 12th, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes. Update - Thu, 12 Mar 2026 06:03:05 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Mar 12, 3:57 AM
Rio de Janeiro I Datacenter Scheduled Maintenance - zscalertwo.net
major

Started: Mar 11, 7:50 PM

investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Rio de Janeiro I (RIO1) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscalertwo.net/cenrMaintenance Window:Start time is March 12, 6:00 pm PST (March 13, 1:00 UTC)End time is Marc...
Mar 11, 7:50 PM
Urgent Maintenance - zscalerone.net
major

Started: Mar 11, 4:14 PM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Thursday at 1:00 AM Pacific Time on Mar 12, 2026 (Thursday, Mar 12, 2026 8:00 AM UTC), and can take up to 3 hours to complete.During maintenance, the Zscaler Client Connector Portal will be in maintenance mode. As a result, access to policy management and reporting will not be available. Existing devices that are already enrolled will not be affecte...
Mar 11, 4:14 PM
Planned Maintenance Activity for ZPA platform service - private.zscaler.com
major

Started: Mar 11, 1:21 PM

investigating
We will be performing planned maintenance on our platform infrastructure in the Prod US region to enhance availability and resiliency.  Some customers may witness below impact during this maintenance window:Momentary disconnect and auto-reconnect of zcc.Any active session will be disconnected and logged under ZPA User Activity logs as “MT_CLOSED_TLS_CONN_GONE_SCIM_USER_MOVED”Important Note: No action is required from customers and this communication is only intended to info...
Mar 11, 1:21 PM
Reporting and Logging Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 11, 11:09 AM

investigating
Zscaler is currently investigating reports of issues with Reporting and Logging on its zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net Cloud. Your organization's policies are being enforced. All user logs are being collected and will be available at the resolution of this incident. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP)....
Mar 11, 11:09 AM
Urgent Maintenance on Dallas I, Dallas II, New York III, New York IV datacenters - zscalerthree.net
major

Started: Mar 11, 5:35 AM

investigating
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the  Dallas I, Dallas II, New York III, New York IV datacenters on the zscalerthree.net cloud. This maintenance can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.Update - Wed, 11 Mar 2026 10:02:18 UTCThis a...
Mar 11, 5:35 AM
Scheduled Maintenance on AMER region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 11, 12:47 AM

investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the AMER region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 6:00 PM Pacific Time on Mar 14, 2026 (Sunday, Mar 15, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after ...
Mar 11, 12:47 AM
Scheduled Maintenance on APAC region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 11, 12:42 AM

investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the APAC region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 6:00 AM Pacific Time on Mar 14, 2026 (Saturday, Mar 14, 2026 01:00 PM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available afte...
Mar 11, 12:42 AM
Scheduled Maintenance on EMEA region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major

Started: Mar 11, 12:39 AM

investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the EMEA region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Friday at 6:00 PM Pacific Time on Mar 13, 2026 (Saturday, Mar 14, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after ...
Mar 11, 12:39 AM
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