title: Remove a Distribution List Owner via powershell
body: <p>If I run the script to add a new admin to a DL, it works fine:</p>
  
  <pre><code>$dl = 'dl@abc.com'
  $Admin = 'admin@abc.com'
  Set-DistributionGroup $dl -BypassSecurityGroupManagerCheck -ManagedBy((Get-DistributionGroup $dl).ManagedBy + $Admin)
  </code></pre>
  
  <p>But If I run this script to remove an admin it fails. I believe this worked in the past.
  The error I get is "does not contain a method named 'op_Subtraction'"</p>
  
  <pre><code>Set-DistributionGroup $dl -BypassSecurityGroupManagerCheck -ManagedBy((Get-DistributionGroup $dl).ManagedBy – $Admin)
  </code></pre>
  
  <p>How can I use powershell to remove an admin from a DL?
  Thanks</p>