title: How to identify a user authenticated with ADAL against ADFS 3.0?
body: <p>I have ADAL for iOS working with an ADFS 3.0 server. It brings up a web view, the user authenticates and I get a call back with an access token.</p>
  
  <p>The problem I have is that I get no information back about the user's identity. The <code>userInformation</code> property is <code>nil</code>. There's no <code>id_token</code> in any of the HTTP responses and I'm not sure how to request one in the first place. And I've seen elsewhere the Microsoft folks say that ADFS 3.0 doesn't support <code>id_token</code> at all. I've also parsed the JWT formatted access token and there's no information in there either that I can use to identify the user.</p>
  
  <p>On the ADFS 3.0 server side, we have configured and enabled a Claim Rule that says to provide the relying party with GUID, Given Name, Surname, and Email Address. But adding that rule made no difference in the responses I get through ADAL.</p>
  
  <p>How can I identify a user (i.e. get a GUID, first name, last name and email address) who was authenticated via ADAL against an ADFS 3.0 server? Is there an endpoint on the ADFS 3.0 server that I can hit with the provided access token where I can request this information?</p>