Clear Cache in Microsoft Teams

In certain situations, it may be necessary to clear cache in Microsoft Teams. These may include issues with placing or receiving calls. Please follow these steps. All chat history, call logs, file data, etc. will remain in the cloud and will repopulate once Teams re-opens.

Locate the Teams icon in the task list by clicking the up arrow in the lower right corner (near the clock)
Right-click the Teams icon
Select Quit Teams
Open Windows Explorer by clicking the yellow folder icon in the task bar
Copy and paste the file path below into the address bar
C:\Users\%username%\AppData\Local\Packages\MSTeams_8wekyb3d8bbwe
Delete all of the contents of this folder, this may take a moment
Re-open Teams

Reference: Clear the Teams client cache - Microsoft Teams | Microsoft Learn