A small subset of admins in North America and Brazil may be unable to access the Microsoft 365 admin center

A post-incident report has been published.

A post-incident report has been published.

Title: A small subset of admins in North America and Brazil may be unable to access the Microsoft 365 admin center User impact: A subset of admins in North America and Brazil may have been unable to access the Microsoft 365 admin center. Final status: The impacting deployment was successfully reverted on all affected machines, and we've confirmed through our telemetry that admins can once again access the Microsoft 365 admin center as expected. Scope of impact: A small subset of admins in North America and Brazil who were attempting to access the Microsoft 365 admin center during the impact timeframe may have been impacted. Start time: Monday, April 6, 2026, at 5:45 PM UTC End time: Monday, April 6, 2026, at 9:55 PM UTC Root cause: A recent deployment introduced a code issue that caused errors in the code path that facilitates calls to the Microsoft 365 admin center. This resulted in an increase in requests to a few of our servers, which caused them to enter an unhealthy state, preventing admins from accessing the Microsoft 365 admin center as expected when connecting to the impacted servers Next steps: - Please see PIR for full list of next steps.

Title: A small subset of admins in North America and Brazil may be unable to access the Microsoft 365 admin center User impact: A subset of admins in North America and Brazil may be unable to access the Microsoft 365 admin center. Current status: The impacting update has been successfully reverted on the majority of the affected infrastructure. We anticipate that the remaining impact will be remediated by our next scheduled update. Scope of impact: A small subset of admins in North America who are attempting to access the Microsoft 365 admin center may be impacted. Start time: Monday, April 6, 2026, at 5:45 PM UTC Preliminary root cause: A recent deployment introduced a code issue which introduced errors in the code path that facilitates calls to the Microsoft 365 admin center and is preventing some admins from accessing the Microsoft 365 admin center as expected. Next update: Monday, April 6, 2026, at 11:30 PM UTC

Title: A small subset of admins in North America and Brazil may be unable to access the Microsoft 365 admin center User impact: A subset of admins in North America and Brazil may be unable to access the Microsoft 365 admin center. Current status: We confirmed that an issue in a recent update introduced errors in the code path that facilitates calls to the Microsoft 365 admin center when encountered by admins, which resulted in their inability to access the Microsoft 365 admin center. As mentioned previously, we're reverting this update to resolve the issue. The reversion was completed on a portion of infrastructure and our telemetry is showing positive trends. We're closely tracking its progress to ensure all infrastructure receives the change. Scope of impact: A small subset of admins in North America who are attempting to access the Microsoft 365 admin center may be impacted. Start time: Monday, April 6, 2026, at 5:45 PM UTC Preliminary root cause: A recent deployment introduced a code issue which introduced errors in the code path that facilitates calls to the Microsoft 365 admin center and is preventing some admins from accessing the Microsoft 365 admin center as expected. Next update: Monday, April 6, 2026, at 9:30 PM UTC

Current status: We're observing some service recovery as our reversion of the recent deployment progresses throughout the impacted infrastructure. We'll continue to carefully monitor the service during the reversion process to confirm full restoration. This quick update is designed to give the latest information on this issue.

Title: A small subset of admins in North America and Brazil may be unable to access the Microsoft 365 admin center User impact: A subset of admins in North America and Brazil may be unable to access the Microsoft 365 admin center. Current status: We've identified a recent deployment which we believe is contributing to impact. We're reverting this deployment and monitoring our service to confirm this resolves the issue. Scope of impact: A small subset of admins in North America who are attempting to access the Microsoft 365 admin center may be impacted. Preliminary root cause: An issue with a recent deployment is preventing some admins from accessing the Microsoft 365 admin center as expected. We'll provide more information regarding the cause as our investigation progresses. Next update: Monday, April 4, 2026, at 8:30 PM UTC

Title: Investigating user reports of Microsoft 365 Admin Center issues in the United States User impact: We don't have details on impact yet. We're seeing an increase in user reported issues above our alerting threshold. Current status: We are reviewing service telemetry and available information to determine if there is an issue happening and we'll update this message shortly with our latest findings. This communication serves as a preliminary notification about a potential issue affecting your service.