title: Get all users with a specific manager
body: <p>I need to have a list of all users with a specific managers.</p>
  
  <p>this is what I have:</p>
  
  <pre><code>
      $manager = Get-user -Filter "UserPrincipalName -eq 'bert@contoso.com'"
  
      $reports = Get-User -Filter "manager eq '??????'"
  
      $reports | FL
  </code></pre>
  
  <p>However I can't get it to work. This script will run against a O365 cloud environment.</p>