PowerShell Basics: How to Delete Microsoft Teams Cache for All Users

Processes teams.exe and outlook.exe block some files in the cache. If you want to wipe all cache completely, try this

Get-CimInstance -Query "select * from Win32_Process where Name='outlook.exe' or Name='teams.exe'" -ErrorAction Ignore |
    Where-Object -FilterScript {$owner = $_ | Invoke-CimMethod -MethodName GetOwner; $owner.User -eq $env:UserName} |
    Invoke-CimMethod -MethodName Terminate > $null

Remove-Item -Path $HOME\AppData\Roaming\Microsoft\Teams\* -Recurse -Force -ErrorAction Continue

WARNING: The first command kills outlook and teams processes for the current user.