title: Why no Authorization Header received in SSO?
body: <p>I implement a SSO with NTLM and passthru, and it works if our client had joined into domain.
  As in our code we will check if there is a "Authorization header" in the request header. And the problem is:  </p>
  
  <ol>
  <li><p>If our client joined domain, then in our application, I can receive the Authentication header which contain NTLM ...  </p></li>
  <li><p>If our client didn't join domain and login buy key in the username and password, no Authorization header are received, so I can not authorized them.<br>
  My problem is : How can I make all the client can send Authorization header all the time even though they didn't join domain ?  </p></li>
  </ol>