Microsoft 365 Alert : Service Degradation – Exchange Online – Some admins can’t access the classic Exchange admin center and receive a 500 error – RESOLVED

19/08/2022 10:15:00 AM (BST)

Issue Reported : 10/08/2022 13:00:00 PM BST

NHSMail Reference : INC31167194

Microsoft Reference : EX415027

Issue Status : RESOLVED

Issue Description : Admins were unable to access the classic Exchange admin center and received a 500 error.

More Info : If available to your organization, admins could’ve utilized the modern experience of the Exchange admin center to bypass impact.

Scope of impact : Some admins attempting to access the classic Exchange admin center were impacted.

Final Update : 25/08/2022 09:03:00 AM – Deployment of the fix is complete, and Microsoft has confirmed through telemetry that the impact was resolved.

Root cause : A recent service update, intended to remove portions of code that were utilized by a deprecated service, is instead resulting in failures when attempting to load the classic Exchange admin center.

Next steps : Microsoft will continue to review their code update testing and validation processes to find ways to avoid repeats of similar impact in the future.


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