The Microsoft Teams cache can be deleted manually by deleting all the files and folders in the %appdata%\Microsoft\Teams directory for each user profile. This however can be tedious and can be automated using PowerShell via one line of script.
Get-ChildItem -Path "$env:USERPROFILE\AppData\Local\Microsoft\Teams" -Recurse | Remove-Item -Force -Recurse
Note: It's important to close the Microsoft Teams app on all devices and clear the cache for all users to ensure that the cache is completely cleared.
