My Teams chat history is empty after a restart
Usually the Teams cache is broken; messages live in the cloud and return once the cache rebuilds.
Try this first
- 1Quit Teams fully; right-click the system tray icon and pick 'Quit', do not just close the window.
- 2Open File Explorer and paste %appdata%\Microsoft\Teams (classic Teams) or %localappdata%\Packages\MSTeams_8wekyb3d8bbwe (new Teams) into the address bar.
- 3Rename the folder to something like 'Teams-old' instead of deleting it, just in case.
- 4Restart Teams and sign in. The cache rebuilds and chats reload (a few minutes is normal).
When to bring us in
If chats stay empty after a fresh cache, or only desktop is missing them while web is fine, we should look at the tenant.
See also
- Outlook crashes or freezes on large attachmentsUsually the mailbox cache is the culprit, not Outlook itself. Shrinking or relocating usually helps within ten minutes.
- Teams: they cannot hear me, or I hear nothingIn our experience Teams usually picked the wrong audio device after a Windows update or a new headset.
- OneDrive has stopped syncingThe cloud icon is grey or has a warning. Locally changed files are not showing up for colleagues.
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