title: Azure Active directory login page and Xframe issue
body: <p>We have an Azure website with Authentication/Authorization enabled on the site connecting to Active Directory. The app in the browser redirects to default login page and works fine.</p>
  
  <p>The same login page fails to load in SalesForce canvas app as the SF canvas app loads the page in the iframe.</p>
  
  <p>The page is throwing following error in the browser</p>
  
  <p>Refused to display '<a href="https://login.microsoftonline.com/dc5133dd-ee6e-4110-a50c-ddb882f6e7e3/oaut" rel="nofollow noreferrer">https://login.microsoftonline.com/dc5133dd-ee6e-4110-a50c-ddb882f6e7e3/oaut</a>….aspx%26b2cPolicy%3D&amp;nonce=ccd2336c376c400c94a820cc08945250_20170202084203' in a frame because it set 'X-Frame-Options' to 'DENY'.</p>
  
  <p>Any alternate approach to load the default AAD login page in iframe will be helpful. </p>