Admins intermittently may be unable to access the Microsoft 365 admin center

Title: Admins intermittently may be unable to access the Microsoft 365 admin center User impact: Admins intermittently may have been unable to access the Microsoft 365 admin center. Final status: We've validated that an unexpected influx in requests caused performance degradation and failures for admins attempting to access the Microsoft 365 admin center. We've implemented additional performance optimizations to assist with processing affected traffic. After completing an internal monitoring period, we've validated that impact is remediated. Scope of impact: Admins attempting to access the Microsoft 365 admin center may have been intermittently affected. Start time: Monday, October 5, 2026, at 10:28 PM UTC End time: Monday, October 5, 2026, at 11:37 PM UTC Root cause: An unexpected influx in requests and caused performance degradation and failures for admins attempting to access the Microsoft 365 admin center. Next steps: - We're evaluating what additional performance optimizations or safeguards we can implement to further the resiliency of our service. This is the final update for the event.

Title: Admins intermittently may be unable to access the Microsoft 365 admin center User impact: Admins intermittently may be unable to access the Microsoft 365 admin center. Current status: We're continuing to analyze the unusually large increase in requests to the Microsoft 365 admin center along with recent service updates to isolate potential sources of impact that contributed to the traffic increase. We’ve implemented performance optimizations to assist with processing affected traffic and we've validated that service availability has recovered to pre-impact levels. We're continuing our investigation in order to isolate and remediate the underlying root cause to ensure the similar scenario does not occur again in the future. Scope of impact: Admins attempting to access the Microsoft 365 admin center may be intermittently affected. This section may be updated as the investigation progresses. Start time: Monday, October 5, 2026, at 10:28 PM UTC Next update by: Tuesday, October 6, 2026, at 1:30 AM UTC

Title: Admins intermittently may be unable to access the Microsoft 365 admin center User impact: Admins intermittently may be unable to access the Microsoft 365 admin center. Current status: We’re investigating an unusually large increase in requests to the Microsoft 365 admin center and expect that this increase is resulting in requests queuing and timing-out. We’re reviewing options for mitigating this issue and determining if other factors are contributing to the problem. Scope of impact: Admins attempting to access the Microsoft 365 admin center may be intermittently affected. This section may be updated as the investigation progresses. Next update by: Tuesday, October 6, 2026, at 12:30 AM UTC

Title: Some admins can't access the Microsoft 365 admin portal User impact: Admins may be unable to access the Microsoft 365 admin portal. Current status: We're investigating a potential issue impacting admin access to the Microsoft 365 admin portal in certain regions and we're checking for impact to your organization. We'll provide an update within 30 minutes.