title: Adding and removing extensionattribute to AD object
body: <p>I'm using powershell to modify some AD extensionattribute.</p>
  
  <p>This is my code to add an extensionattribute</p>
  
  <pre><code>Set-ADUser -Identity "anyUser" -Add @{extensionAttribute4="myString"}
  </code></pre>
  
  <p>It works, but how can I remove the same extensionattribute? I can't find anything similar to <code>-remove</code>.</p>