title: HTTP Error 400. The size of the request headers is too long
body: <p>I am trying to do authentication via Azure AD on my Sitecore Instance. I've added my application to the approved list by creating the App Service.</p>
  
  <p>However after the login, the user is redirected to the <code>/Account/ExternalLoginCallback</code> page on the Identity server and it displays the following error message:</p>
  
  <blockquote>
    <p>HTTP Error 400. The size of the request headers is too long.</p>
  </blockquote>