
If you are having problems with Microsoft Teams, you can try clearing the cache on your device. This may help solve some issues you may be experiencing. Below are the steps you need to take to clear your Teams cache on your Mac.
You’ll need to start by closing Microsoft Teams.
1: Right-click the Microsoft Teams icon in your dock, then click Quit.

2: Open Finder, then click Go and select Go to Folder.

3: Copy and paste the following into the Go to Folder box, then click Go:
~/Library/Application Support/Microsoft

4: Right Click on the Teams folder and select Move to Trash.

5: Click on the magnifying glass in the upper-righthand corner of your screen to open Spotlight Search.

6: Enter “Keychain” and select Keychain Access.

7: Within Keychain Access, search for “Microsoft Teams” and locate the “Microsoft Teams Identities Cache” entry.
8: Right-click to delete the entry and then close Keychain Access.

9: Now Relaunch Microsoft Teams and your cache is officially cleared!
Note: You may need to sign back into Teams.
This worked perfectly for me, thanks!
Why in this case is it necessary to go into the Keychain?