Look for Teams with Guests

When rolling out classifications on Teams in an existing environment it can be good to know how many Teams that already have Guest Users invited. To gather this information I put together an easy PowerShell script. Running this script requires that you install the Microsoft Teams PowerShell module.

#Array for Teams with Guests
$teamswithguests = @()
#Collect all Teams in tenant
$teams = get-team
#Loop to get all Teams with Guests accounts
foreach ($team in $teams){
  #Get groupid 
  $groupid = $team.groupid
  #search through teams with guest users
  $users = Get-TeamUser -GroupId $groupid |where role -eq "Guest"
  $count = $users.count
    if ($count -eq "0"){
        Write-host "there are no external user added $($team.DisplayName)" -ForegroundColor Cyan
    }
    else{
        $teamswithguests += $team
        Write-Host "Team $($team.DisplayName) has these external members" -ForegroundColor DarkMagenta
    }
}
#List teams with Guest users
$teamswithguests

Hope this will help you in your Teams rollout.

Regards @jlindoe