If you're experiencing issues that affect Microsoft Teams, clearing the cache on your device may help. After you clear the cache, restart Teams.
Note:
%appdata%\Microsoft\Teams
If Teams is still running, right-click the Teams icon in the dock, and then select Quit, or press Command (⌘)-Q.
In the Finder, click Go in the menu bar at the top, and select the Go to Folder option.
Next, copy and paste the following path in the text field on the pop-up window and click Go.
~/Library/Application Support/Microsoft
Right-click on the Teams folder and select Move to Bin. Restart Teams.
Open Spotlight Search by clicking on the magnifying glass icon at the top right corner of the menu bar or press Command + space bar.
Type "Keychain" in Spotlight Search, and from the suggestion that appear, click on Keychain Access.
Search for "Microsoft Teams" in Keychain Access and locate the Microsoft Teams Identities Cache. Right click on this item and select Delete. Close Keychain Access.