title: Requesting token from ACS endpoint in exchange of identity Provider token
body: <p>I followed the official tutorial(<a href="http://msdn.microsoft.com/en-us/library/hh674475" rel="nofollow">http://msdn.microsoft.com/en-us/library/hh674475</a>) for requesting the ACS token in exchange of Identity Provider(Facebook) Token via SWT Token request.</p>
  
  <p>I tried every possible thing and I'm unable to get rid of this error</p>
  
  <blockquote>
    <p>ErrorCode:400:SubCode:T1019:Detail: Inavlid SWT token. The
    wrap_assertion value is not a SWT assertion</p>
  </blockquote>
  
  <p>Note: </p>
  
  <ol>
  <li>I have already verified Issuer= [Realm under Edit Identity provider Page]</li>
  <li>Signing key is the same symmetric key as shown under Token signing key</li>
  <li>I am also wrapping facebook accesstoken as claim in my SWT token to ACS endpoint in order to get ACS token in return.</li>
  </ol>
  
  <p>Correct me if I am doing something wrong, yeah i googled a lot about this but found nothing to resolve!</p>
  
  <p>P.S: I have also tried Password Token request with my Service Identity and it just works fine.</p>