title: How do I log out of Facebook when using Azure's ACS?
body: <p><a href="http://developers.facebook.com/policy/" rel="nofollow noreferrer">Rule #6 of the Facebook developer policy</a> says I must provide an explicit Log out link, but I'm unable to make it work.</p>
  
  <p>My goal is to either sign my application out of Facebook, the user from the entire Facebook experience environment, or both.  So far, I can't do any of these.</p>
  
  <p>This may be complicated by the fact I'm using Azure ACS and am not using the typical FB APIs.  Things I've tried include:</p>
  
  <p><a href="https://stackoverflow.com/questions/2764436/facebook-oauth-logout">Attempt 1: Facebook OAuth Logout</a></p>
  
  <pre><code> "http://www.facebook.com/logout.php?api_key={0}&amp;;session_key={1}";
   // I don't know how to get the session key.  I attempted the values stored in 
   // the claim  "http://www.facebook.com/claims/AccessToken" but no luck
  </code></pre>
  
  <p>Attempt 2: ACS logout (undocumented?)</p>
  
  <pre><code>https://tlsadmin.accesscontrol.windows.net/v2/wsfederation?wa=wsignoutcleanup1.0 
  </code></pre>
  
  <p>Neither of these approaches allow an alternate Facebook user to sign in.  Any links would be appreciated.</p>
  
  <p><strong>Simplified Question</strong></p>
  
  <blockquote>
    <p>How do I get *.accescontrol.windows.net to redirect back to my website?  </p>
  </blockquote>