Teams Client status unknown on a single client

This helped in combination with clearing the cache of edge and IE:

1. Exit of the Microsoft Teams Desktop APP and all other applications.
2. Right click on the Teams icon in your system tray
3. Click Quit (I logged out)
4. Click on the File Explorer
5. In the address bar copy and paste the following location into File Explorer: %appdata%\Microsoft\Teams
6. Delete all files and folders in that Directory (If Outlook is running you will be unable to remove one directory. Make sure Outlook is not running)
7. Restart the Computer
8. Restart Microsoft Teams.

Only after clearing ALL the Teams cache locations is it considered a clean start for the Teams app.
Other locations for Microsoft Teams clients are:
• %AppData%\Microsoft\teams\application cache\cache
• %AppData%\Microsoft\teams\blob_storage
• %AppData%\Microsoft\teams\databases
• %AppData%\Microsoft\teams\cache
• %AppData%\Microsoft\teams\gpucache
• %AppData%\Microsoft\teams\Indexeddb
• %AppData%\Microsoft\teams\Local Storage
• %AppData%\Microsoft\teams\tmp
Google Chrome cache files location
• %LocalAppData%\Google\Chrome\User Data\Default\Cache
• %LocalAppData%\Google\Chrome\User Data\Default\Cookies
• %LocalAppData%\Google\Chrome\User Data\Default\Web Data
Internet Explorer cache files location
• Internet Explorer Temporary Internet Files
• Internet Explorer Cookies