Admins may be unable to access the Exchange admin center (EAC)
ID: EX1051697
Issue type: Incident
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Impacted services
Exchange Online
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Details
Title: Admins may be unable to access the Exchange admin center (EAC)
User impact: Admins may have been unable to access the Exchange admin center (EAC).
More info: Admins may have received the following error "HTTP Error 500".
As a workaround, admins were able to access the EAC using https://admin.cloud.microsoft/exchange#/.
Final status: We've verified by monitoring telemetry that our corrective steps to re-direct the impacted URL traffic to a working URL have successfully remediated the issue.
Scope of impact: This issue could have affected any admin accessing the Exchange admin center.
Start time: Wednesday, April 9, 2025, at 9:50 AM UTC
End time: Wednesday, April 9, 2025, at 3:30 PM UTC
Preliminary root cause: An authentication issue within a specific URL path caused HTTP 500 errors resulting in impact.
Next steps:
- We're reassessing our service monitoring of this impact scenario to implement improvements for detecting similar events and reduce the time to identify and address this type of impact.
We'll provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.
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