Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users may be unable to search new users in Microsoft Teams by their display name – RESOLVED

Announcements Arpan Das

06/01/2025 09:01:00 AM

NHSmail Reference: INC46717120

Microsoft Reference: TM1212728

Issue Status: RESOLVED

Issue Description: Users may have been unable to search new users in Microsoft Teams by their display name.

More info: This may impact users in both the desktop and web clients. Users can still search new users using their email address.

Final Update: 12/01/2026 11:20:00 AM – Microsoft have successfully completed the reindexing and verified with some affected users, that impact has fully resolved.

Scope of impact: Users attempting to search new users in Microsoft Teams by their display name may have been impacted.

Root cause: A recent change to our Active Directory service introduced a regression affecting user search functionality.

Next steps: Microsoft are reviewing our change procedures to help prevent similar problems in the future.