Office 365 Exchange Online Check for HiddenFromExchangeClientsEnabled

Check for HiddenFromExchangeClientsEnabled.ps1

$Groups = Get-UnifiedGroup -ResultSize Unlimited | Select DisplayName, Alias, PrimarySmtpAddress, HiddenFromExchangeClientsEnabled
Write-Host "Processing" $Groups.Count "groups"
$Report = @()
$TeamsGroups = 0
$NoConvHistory = 0
ForEach ($G in $Groups) {
   Write-Host "Processing" $G.DisplayName 
   If ($G.HiddenFromExchangeClientsEnabled -eq $true) { # Used to be HiddenFromExchangeClients
      $ChatCheck = $Null
      $ChatCheck = (Get-MailboxFolderStatistics -Identity $G.Alias -FolderScope ConversationHistory -IncludeOldestAndNewestItems)
      If ($ChatCheck -eq $Null) { $NoConvHistory++ }
      # Check that we have a Teams compliance folder and some items are present      
      ElseIf ($ChatCheck.FolderType[1] -eq "TeamChat" -and $ChatCheck.ItemsInFolder[1] -gt 0) {
         $TeamsGroups++
         Write-Host $G.DisplayName "has" $ChatCheck.ItemsInFolder[1] "compliance records - so it's active for Teams and hidden from Outlook"
         $DateLastItem = $ChatCheck.NewestItemReceivedDate[1]
         $ReportLine = [PSCustomObject][Ordered]@{
            GroupName = $G.DisplayName
            Alias     = $G.Alias
            Email     = $G.PrimarySmtpAddress
            Chats     = $ChatCheck.ItemsInFolder[1]
            LastAdded = $DateLastItem
            Hidden    = $G.HiddenFromExchangeClientsEnabled }        
         $Report += $ReportLine   }
    }
}
Write-Host $TeamsGroups "groups are used by Teams and could be unhidden from Exchange Clients"