management-scripts/Fix-MicrosoftTeams.ps1

# Make sure Microsoft Teams is installed
If ( Test-Path "${Env:LocalAppData}\Microsoft\Teams\Update.exe" ) {

    # Get all running Teams processes
    $ProcessList = (Get-Process -Name 'teams' -ErrorAction SilentlyContinue)

    If ( $ProcessList ) {
        LogMsg "Stopping Microsoft Teams"
        Try { $ProcessStopped = $true ; $ProcessList | Stop-Process -Force }
        Catch { LogErr $_.Exception.Message }
    } Else { $ProcessStopped = $false }

    # Remove all cached content
    $CacheDir = "${Env:AppData}\Microsoft\Teams"
    If ( Test-Path $CacheDir ) {
        LogMsg "Removing all cached data for Microsoft Teams"
        Try { Remove-Item $CacheDir -Recurse -Force }
        Catch { LogErr $_.Exception.Message }
    } Else { LogMsg "Could not clear cached data for Microsoft Teams because the directory could not be found: ${CacheDir}" }

    # Restart Teams if we needed to close it before clearing the cache
    If ( $ProcessStopped ) {
        LogMsg "Starting Microsoft Teams"
        Try { Start-Process "${Env:LocalAppData}\Microsoft\Teams\Update.exe" -ArgumentList "--processStart ""Teams.exe""" }
        Catch { LogErr $_.Exception.Message }
    }
} Else { LogMsg "Cannot clear cache for Microsoft Teams because it isn't installed" }