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.
June 2026
Scheduled Maintenance Extended - EMEA Region - zscloud.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
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.
Urgent Maintenance on Dallas I, Dallas II, New York III, New York IV datacenters - zscaler.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
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 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. Please contact Zscaler Support if you have additional questions.
Urgent Maintenance on Dallas I, Dallas II, Washington DC, Washington DC IV datacenters - zscloud.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Dallas I, Dallas II, Washington DC, Washington DC IV datacenters on the zscloud.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. Please contact Zscaler Support if you have additional questions.
Zscaler is investigating an issue affecting Nanolog Streaming Service (NSS) feed filtering. 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 - Thu, 18 Jun 2026 07:27:01 UTCZscaler has identified a permanent fix. The fix is being deployed to ZS3 and ZS3 Cloud this w...
Zscaler will be performing hardware maintenance in the Brussels II (PAR4) Datacenter.Maintenance window,Start: 2026-06-18 19:30 CESTEnd: 2026-06-18 21:30 CEST(i.e. 2026-06-18 17:30 - 19:30 UTC)During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.Update - Thu, 18 Jun 2026 21:42:18 UTCThis activity has been completed. Please contact Zscaler Support if you have additional quest...
What Zscaler is standardizing the post-login landing experience so that tenants move to the Zscaler Experience Center as the steady-state destination instead of the Authentication Service.Action RequiredNo action is necessary. Zscaler encourages customers to utilize the Experience Center, as standalone portals are being phased out by Sept 30, 2026.AvailabilityChange is happening on June 19, 2026 What is changingZscaler is revising the Admin login redirection process to support the o...
Munich I (MUC1) Datacenter Network Maintenance - zscaler.net, zscloud.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing hardware maintenance in the Munich I (MUC1) Datacenter.Maintenance window,Start: 2026-06-17 20:00 CESTEnd: 2026-06-17 23:00 CEST(i.e. 2026-06-17 18:00 - 21:00 UTC)During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.Update - Thu, 17 Jun 2026 20:13:50 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Manchester II (MAN2) Datacenter Network Maintenance - zscaler.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing hardware maintenance in the Manchester II (MAN2) Datacenter.Maintenance window,Start: 2026-06-17 22:00 BSTEnd: 2026-06-18 01:00 BST(i.e. 2026-06-17 21:00 - 2026-06-18 00:00 UTC)During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.Update - Wed, 17 Jun 2026 23:07:39 UTCThis activity has been completed. Please contact Zscaler Support if you have addit...
Atlanta II (ATL2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing hardware maintenance in the Atlanta II (ATL2) Datacenter.Maintenance window,Start: 2026-06-17 03:00 EDTEnd: 2026-06-17 07:00 EDT(i.e. 2026-06-17 07:00 - 11:00 UTC)Update - Wed, 17 Jun 2026 09:56:29 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Urgent Maintenance on AMER Region - zscloud.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on AMER Region on the zscloud.net cloud. This maintenance 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 maintenance is complete. Please contact Zscaler Support if you have additional questions.
