title: Adding group to group using the PowerShell ADSI provider
body: <p>I tried the following after creating the new group:</p>
  
  <pre><code>$adminGroup = [ADSI]"WinNT://./Administrators"
  $group =[ADSI]"WinNT://./Test1"
  #$adminGroup.Add($group) - This does not work
  </code></pre>
  
  <p>Any idea what is missing?</p>