Microsoft 365 Alert – Service Degradation – Exchange Online – Some users searches may fail and provide no results in the Outlook desktop client and Outlook on the web – RESOLVED

03/01/2025 09:09:00 AM

NHSmail Reference: INC47829039

Microsoft Reference: EX939228

Issue Status: RESOLVED

Issue Description: User’s searches may fail and provide no results in the Outlook desktop client and Outlook on the web.

Current Update: 27/01/2025 08:58:00 AM The fix deployment has completed, and after a period of monitoring, Microsoft have confirmed impact was remediated.

Scope of impact: Some users attempting to perform searches in the Outlook desktop client and Outlook on the web may be intermittently impacted.

Root cause: A service memory issue is causing the infrastructure responsible for facilitating core service search to intermittently go into an unresponsive state.

Next Steps: To help prevent similar impact in the future, Microsoft are further reviewing the underlying cause of the service memory issue.

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