Additional team and channel-related features and issues within Microsoft Teams for business
Hi @CM,
Thanks again for your patience and for pointing out the missing responses earlier. I want to confirm that the issue you're experiencing with the missing Teams tab and unreliable Channels visibility is part of a known incident affecting Microsoft Teams desktop users.
Microsoft has acknowledged this issue under Incident ID: TM1139221. It stems from a configuration change error that disrupted the combined Chat and Channel view in the Teams UI. As a result:
- The Teams tab may disappear or become unresponsive.
- Channels may only appear briefly or not at all under Chat.
- The layout toggle to separate Chats and Channels may be missing.
On the other hand, there still are some workarounds that you could try:
1/ Quickly access Settings: If the layout toggle appears briefly, go to Settings > Chats and Channels and choose separate.
2/ Clear Teams Cache: Navigate to %appdata%\Microsoft\Teams and delete the contents (if the folder exists).
3/ Use Web Client: The issue does not affect the browser version of Teams.
As of August 22, 2025, Microsoft has rolled back the configuration change, and recovery has been confirmed for impacted users. However, some users may still experience residual glitches until the fix fully propagates.
- You can pin the Teams tab if it reappears by right-clicking it in the left-hand rail.
- Use Search to jump directly to Channels or documents.
- If the issue persists, consider reinstalling Teams or reporting it via Settings > Feedback > Report a problem.
Sorry again for the disadvantages. Please let me know if the issue continues or if you need any further assistance. I’m here to support you.
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