Provider resolved: . The notice publication date does not establish the outage start.
resolved
Zscaler teams have successfully deployed the fix during the planned maintenance window. Post-deployment sanity validation has been completed with successful results, and the service remains stable.
Increased CAPTCHA Challenges During Web Access - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
The increased Google CAPTCHA activity has subsided, and this incident is resolved. The investigation linked the repeated challenges to Google’s automated traffic detection. No contributing changes to Zscaler services were identified. A subset of users experienced repeated CAPTCHA prompts when accessing Google services or websites using Google CAPTCHA, interrupting searches and related workflows. Customers who continue to encounter Google CAPTCHA prompts should review Avoiding Google CAPTCHA...
Miami III, Miami IV Datacenter Issue - zscalertwo.net, zscalerthree.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Zscaler has isolated the connectivity degradation affecting Miami III and Miami IV to congestion on external ISP network paths. Corrective action is required from the relevant service provider. This incident notification is now closed. Customers experiencing continued impact should contact their ISP to request path optimization. Connecting through an alternate data center may help mitigate the impact; please validate connectivity after failover. Contact Zscaler Support if further assistance i...
Intermittent Connectivity Issues Affecting Plain UDP Tunnels for Branch Connectors and Cloud Connectors in APAC - zscloud.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Zscaler has completed post-deployment monitoring and confirmed that all affected services are functioning as expected. Based on continued stability and healthy service checks, we are marking this incident as Resolved.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
update
We are receiving positive feedback from multiple customers indicating service recovery. Our teams continue to closely monitor services and will provide further updates as more information becomes available.
update
We have reverted the contributing configuration change and implemented additional adjustments to improve service capacity on ZS2. We are currently validating these changes and monitoring recovery for Zscaler Client Connector sign-in/registration and Mobile Admin Portal access. We will provide another update as validation completes or if service status changes.
update
We are continuing to investigate an issue impacting Zscaler Client Connector sign-in/registration and access to the Mobile Admin Portal for a subset of users on ZS2. Initial mitigation actions did not fully restore service. We identified a contributing configuration change that reduced service capacity for the Mobile Admin Portal on ZS2, which led to intermittent access issues for some users. Our teams are reverting the change and actively applying additional remediation steps to recover affected services. We are monitoring recovery and will provide further updates as more information becomes available.
update
We are investigating an issue impacting Zscaler Client Connector sign-in/registration and access to the Mobile Admin Portal for a subset of users on ZS2. Mitigation actions have been applied and we are now monitoring the service. We will provide another update as more information becomes available.
update
We have identified the root cause of the issue and working on resolution.
update
Zscaler has detected an Authentication issue with the Zscaler Client Connector Portal and Zscaler Client Connector (ZCC) on its zscalertwo.net Cloud. Some users may see a “Zscaler Client Connector was unable to enroll at this time” message when trying to sign in to Zscaler Client Connector (ZCC). Users who are already signed in should continue to 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 additional details will be posted there as they become available.
Legacy Incident Archive
453 archived records restored. These records predate source-at-observation attestation. They are shown as historical ServiceAlert records only and do not establish a provider-reported incident, resolution, duration, or current active state.
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...
Administration UI and User Authentication Issues - zscalertwo.net
majorSource not attested
Last archived state: investigating
View archived record details
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 - ...
Urgent Maintenance on Mumbai VI and New Delhi I datacenters - zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
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...
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
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...
São Paulo IV (SAO4) Critical Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
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.
Reminder Notification For New Data Center and Old CIDR Deprecation - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
majorSource not attested
Last archived state: investigating
View archived record details
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...
ZIA Platform Alerts – Email Notifications Not Being Delivered - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
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 ...
Planned Maintenance Activity for ZPA authentication service - private.zscaler.com
majorSource not attested
Last archived state: investigating
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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 ...
Urgent Maintenance - zscalertwo.net
majorSource not attested
Last archived state: investigating
View archived record details
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...
