How to count members in an Active Directory group using PowerShell

   There are different methods to get this information when the group is small, but the problem shows up when a group contains thousands of members.

The first cmdlet that I tried was:
$members = Get-ADGroupMember -Identity “Group Name”

The idea is execute the follow line:
$members.count

But I got this error: “The size limit for this request was exceeded”

And the same with the follow cmd lets:
  • Get-ADGroupMember -Identity “Group Name” > C:\Temp\members.txt (even exporting the result to a csv file).
  • Get-ADGroupMember -Identity “Group Name” | Measure-Object
  • Get-ADGroupMember -Identity “Group Name” | Measure-Object | select count

The command that worked properly for me was:
$members = Get-ADGroup -Identity “Group Name” -Properties Members
$members.count

I my case, I ran this command for a group that contains more than 7k members.