Create a Collection of Files for Windows Domain Groups with User Members in Each File

groupenumeration.ps1

#intent is to eventually update DPAT to accept these other fields
#$properties = @('UserPrincipalName';'Enabled';'PasswordLastSet';'PasswordExpired';'PasswordNeverExpires';'whenCreated';'whenChanged') 
$properties = @('UserPrincipalName')
foreach($group in (get-adgroup -filter *)) { 
    $UPNs = @()
    $UPNs = Get-ADGroupMember -Recursive $group.samaccountname -ea SilentlyContinue | get-aduser -properties $properties -ea silentlycontinue | Select-Object -ExpandProperty $properties -ea silentlycontinue
    if($UPNs.Count -ge 1){
        $members = @()
        foreach($UPN in $UPNs){
            $members += ("{0}\{1}" -f $UPN.split("@")[1], $UPN.split("@")[0])
        }
        Out-File -InputObject $members -FilePath ("{0}.txt" -f $group.samaccountname) -Encoding ASCII
    }
}