title: Authorization_IdentityNotFound Error while accessing graph API
body: <p>I have searched with the error which I found, Did not find any matching questions. So posting question. Appreciate if some one provides some pointers to proceed.</p>
  
  <p>My goal is to access graph API in my desktop client. I have started using fiddler to experiment.</p>
  
  <ul>
  <li>I have followed instructions provided at <a href="https://graph.microsoft.io/en-us/docs/authorization/app_only" rel="nofollow noreferrer">https://graph.microsoft.io/en-us/docs/authorization/app_only</a></li>
  <li>registered Web APP using Application Registration portal using my Microsoft work account.</li>
  <li>Provided 'Read all users' full profiles in Delegated permissions</li>
  <li><p>Requested token and Used the token in Authorization header to call the graph API, Getting following error.</p>
  
  <pre><code>https://graph.microsoft.com/v1.0/users
  119
  {
    "error": {
      "code": "Authorization_IdentityNotFound",
      "message": "The identity of the calling application could not be established.",
      "innerError": {
        "request-id": "4c3a7bc6-e3d8-453c-adc9-5a12fec3b0ee",
        "date": "2016-05-11T00:46:23"
      }
    }
  }
  </code></pre></li>
  </ul>