💡 Our Technical Review in summary
Microsoft has resolved an incident that prevented users in the North America region from accessing the Microsoft 365 admin center and the Microsoft 365 app. The issue was caused by a recent update to the redirection service’s caching mechanisms, which led to elevated resource utilization and CPU spikes. The service has been fully restored following the reversion of the change and targeted service restarts.
During the incident window (February 10, 2026, 1:56 PM – 4:25 PM UTC), impacted users in North America experienced the following:
- Inability to access the Microsoft 365 admin center.
- Inability to access the Microsoft 365 app.
- Degraded functionality for users who could log in, including the inability to raise support tickets through the admin portal.
Resolved. The service is operating normally. Microsoft has published a Post-Incident Report (PIR) detailing the root cause and long-term preventative measures. Admins can access the full report via the Service Health Dashboard.
Microsoft Official Issue Details
User Impact
Users in the North America region may have been unable to access the Microsoft 365 admin center.
Status: postIncidentReviewPublished
Service: Microsoft 365 suite
Classification: incident
Origin: microsoft
Updates
- 2026-02-17 22:59
A post-incident report has been published. - 2026-02-12 23:13
A post-incident report has been published. - 2026-02-10 17:20
Title: Some users in the North America region may have been unable to access the Microsoft 365 admin centerUser impact: Users in the North America region may have been unable to access the Microsoft 365 admin center.
More info: Users able to access the admin center may have experienced degraded functionality.
As functionality was degraded, users may have been unable to raise support tickets through the Microsoft 365 admin center.
Final status: We’ve confirmed that the issue is resolved through monitoring telemetry and customer validations.
Scope of impact: This issue impacted the North America region.
Start time: Tuesday, February 10, 2026, at 1:56 PM UTC
End time: Tuesday, February 10, 2026, at 4:25 PM UTC
Root cause: A recent change to the redirection service, related to caching mechanisms, resulted in impact. More information is provided within the Post-Incident Report.
Next steps:
– For a more comprehensive list of next steps and actions, please refer to the Post Incident Report document.We’ll provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.
- 2026-02-10 16:47
Title: Some users in the North America region may be unable to access the Microsoft 365 admin centerUser impact: Users in the North America region may be unable to access the Microsoft 365 admin center.
More info: Users able to access the admin center may be experiencing degraded functionality.
As functionality is degraded, users may be unable to raise support tickets through the Microsoft 365 admin center.
Additionally, users may be unable to access the M365 app.
Current status: Whilst we were performing the targeted restarts, parallel root cause investigations identified a recent change to the redirection service which may have been contributing to impact. We’ve reverted the change and are monitoring the service for recovery. Telemetry indicates that the service is beginning to recover.
Scope of impact: This issue impacts the North America region.
Next update by: Tuesday, February 10, 2026, at 6:00 PM UTC
- 2026-02-10 16:10
We’ve identified elevated resource utilization in the service that routes requests to the admin center, and we’re restarting the service to mitigate impact.This quick update is designed to give the latest information on this issue.
- 2026-02-10 15:48
Title: Some users in the North America region may be unable to access the Microsoft 365 admin centerUser impact: Users in the North America region may be unable to access the Microsoft 365 admin center.
More info: Users able to access the admin center may be experiencing degraded functionality.
As functionality is degraded, users may be unable to raise support tickets through the Microsoft 365 admin center.
Additionally, users may be unable to access the M365 app.
Current status: We’re continuing to analyze diagnostic data from the Microsoft 365 admin center infrastructure, with a current focus on usage patterns and Central Processing Unit (CPU) utilization levels. Additionally, we’re reviewing HTTP Archive (HAR) files provided by impacted users to support our investigation.
Scope of impact: Initial reports indicate that the issue is occurring in the North America region. We’ll provide more information once identified.
Next update by: Tuesday, February 10, 2026, at 5:30 PM UTC
- 2026-02-10 15:18
We’re continuing to review telemetry related to Microsoft 365 admin center access to isolate the source of the issue.This quick update is designed to give the latest information on this issue.
- 2026-02-10 14:50
Title: Some users in the North America region may be unable to access the Microsoft 365 admin centerUser impact: Users in the North America region may be unable to access the Microsoft 365 admin center.
More info: Users able to access the admin center may be experiencing degraded functionality.
As functionality is degraded, users may be unable to raise support tickets through the Microsoft 365 admin center.
Additionally, users may be unable to access the M365 app.
Current status: We’re reviewing service monitoring telemetry to isolate the root cause and develop a remediation plan.
Scope of impact: Initial reports indicate that the issue is occurring in the North America region. We’ll provide more information as we investigate.
Next update by: Tuesday, February 10, 2026, at 4:00 PM UTC
