Hide groups used by teams

# Review required modules and connection steps before running.
# Connect to Microsoft Graph or Exchange Online as needed for this script.

Clear-Host
$ModulesLoaded = Get-Module | Select-Object Name
If (!($ModulesLoaded -match "ExchangeOnlineManagement")) {Write-Host "Please connect to the Exchange Online Management module and then restart the script"; break}
 
$HiddenGroups = 0
Write-Host "Finding team-enabled Microsoft 365 Groups and checking for any which are visible to Exchange clients"
[array]$Groups = Get-UnifiedGroup -Filter {ResourceProvisioningOptions -eq "Team"} -ResultSize Unlimited
# Reduce to the set visible to Exchange clients
[array]$Groups = $Groups | Where-Object {$_.HiddenFromExchangeClientsEnabled -eq $False}
 
# Process the remaining groups and hide them from Exchange
If ($Groups.Count -ne 0) {
  ForEach ($Group in $Groups) {
     Write-Host "Hiding" $Group.DisplayName
     $HiddenGroups++
     Set-UnifiedGroup -Identity $Group.ExternalDirectoryObjectId -HiddenFromExchangeClientsEnabled:$True -HiddenFromAddressListsEnabled:$True
  }
} Else {
  Write-Host "No team-enabled Microsoft 365 Groups are visible to Exchange clients and address lists"
}
 
Write-Host ("All done. {0} team-enabled groups hidden from Exchange clients" -f $HiddenGroups)