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.
May 2026
Inline DLP Policy Editing Issue for Non Super Admin Users - zscalertwo.net, zscalerthree.net
Source not attested
Last archived state: investigating
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investigating
Zscaler is investigating an issue impacting tenants with Admin Ranking enabled, where administrators without Super Admin privileges may be unable to edit inline DLP policies after creation. Current investigation indicates newly created or existing inline DLP policies may be assigned an incorrect administrative rank value, preventing subsequent policy modifications by the original administrator. At this time, Super Admin accounts remain able to modify affected policies. Zscaler teams are activ...
Tokyo V (TYO5) Datacenter Network Maintenance - zscloud.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing hardware maintenance in Tokyo V (TYO5) Datacenter.Maintenance window: Start: 2026-05-20 11:00 UTC End: 2026-05-20 14:00 UTC (Local Time 2026-05-20 20:00 - 2026-05-20 23:00 JST)Update - Wed, 20 May 2026 12:48:09 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
DNS resolution Control Gateway issue on ZS2 - zscalertwo.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with 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- Issue occurred due to an control-plane event that temporarily prevented control gateway DNS endpoints from being published.Latest Update - Tue, 19 May 2026 ...
Upcoming New Data Centers and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Dear Zscaler Customer,In accordance with Zscaler Service Continuity Policy and per email notification sent on May 15, 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 July 14, 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...
Miami IV Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
Source not attested
Last archived state: investigating
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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 Miami IV (MIA4) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on May 19, 2026What if I have more questions? Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page....
Reminder Notification for Upcoming New DCs and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
Source 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 April 1st, 2026, we would like to remind you of the upcoming New DCs and expansions at the locations listed below. These would be available anytime on or after May 31, 2026Please update your firewall policy rules and any upstream access lists to allow the new IP address ranges to avoid any service disruption.RegionLocationCIDRNotesAmericasMontreal I198.1...
Madrid IV (MAD4) Datacenter Network Maintenance - zscalertwo.net
minorSource not attested
Last archived state: resolved
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resolved
Zscaler will be performing hardware maintenance in Madrid IV (MAD4) Datacenter.Maintenance window: Start: 2026-05-19 18:00 UTC End: 2026-05-19 21:00 UTC (Local Time 2026-05-19 20:00 - 2026-05-19 23:00 CEST)Update - Tue, 19 May 2026 21:01:52 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Madrid IV (MAD4) Datacenter Network Maintenance - zscloud.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing hardware maintenance in the Madrid IV (MAD4) Datacenter.Maintenance window,Start: 2026-05-19 16:00 UTCEnd: 2026-05-19 19:00 UTC(i.e. 2026-05-19 18:00 - 21:00 Local Time)Update - Tue, 19 May 2026 18:49:58 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Urgent Maintenance on AMER Region - zscaler.net
minorSource not attested
Last archived state: resolved
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resolved
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on AMER Region on the zscaler.net cloud. This maintenance 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. 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 ...
Amsterdam II Datacenter Issue - zscalertwo.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with our Amsterdam 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 cha...
