TM1147987: Microsoft Teams Service Health Incident

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365 Service Alert

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Sep 12, 2025, 3:18:53 PMSep 12
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Users' searches for internal users in Microsoft Teams aren't providing any results.                                                                                                                                                                                                                         
Microsoft

Users' searches for internal users in Microsoft Teams aren't providing any results

ID: TM1147987

Issue type: Incident

Status

False Positive

Impacted services

Microsoft Teams

Details

Title: Users' searches for internal users in Microsoft Teams may not provide any results

User impact: Users' searches for internal users in Microsoft Teams may not provide any results.

More info: Users can avoid this issue by creating chats with other internal users with the following steps below while we work on mitigation:

1) Open the Outlook desktop client

2) Click on the Home tab

3) Click on the "Address book" button

4) Use the search box to find the person you're looking for

5) Right click the person, then select "Add to Contacts"

6) Copy the email address

7) Paste it into either Teams or a new email

Current status: We're continuing to apply the same mitigation strategy by splitting large index files into smaller segments. However, due to the volume of files involved, progress is taking longer than anticipated. We'll share an estimated completion timeline as soon as it's available.

Scope of impact: Users performing searches for internal users in the Microsoft Teams desktop and web clients may be impacted.

Start time: Wednesday, August 27, 2025, at 1:09 PM UTC

Root cause: An issue with large index files is caused by indexing not being properly partitioned as expected, resulting in impact.

Next update by: Monday, September 15, 2025, at 5:00 PM UTC

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