title: Office.context.ui.displayDialogAsync not working in Outlook for Office 365
body: <p>I have a sign in button in my add-in that opens the microsoft oauth and this is achieved using the displayDialogAsync. I tried first in outlook web app (<a href="https://outlook.live.com" rel="nofollow noreferrer">https://outlook.live.com</a>) and it is working properly there, that is, it opens the dialog for sign in. But then I tried the same in the desktop client but when I click the sign in button nothing happens.</p>
  
  <pre><code>Office.context.ui.displayDialogAsync(fullUrl,
          { height: 40, width: 40 }, function (result) {
              _dlg = result.value;
              _dlg.addEventHandler(Office.EventType.DialogMessageReceived, processMessage);
          });
  </code></pre>