Microsoft 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.