title: Server is unwilling to process the request - Active Directory - Add User via C#
body: <p>I used the example in <a href="http://www.codeproject.com/Articles/18102/Howto-Almost-Everything-In-Active-Directory-via-C#36" rel="noreferrer">this page</a> to add a user to an Active Directory group, but I get an exception with the message "Server is unwilling to process the request" when executing</p>
  
  <p><code>dirEntry.Properties["member"].Add(userDn);</code></p>