title: Adding SSO to an existing MVC application
body: <p>We have an existing MVC application which is used by multiple customers.</p>
  
  <p>Currently, each customer is given a URL to our application e.g. <a href="https://myapp/mycustomername" rel="nofollow">https://myapp/mycustomername</a>.</p>
  
  <p>When they go their, they are presented with a login screen.</p>
  
  <p>For some customers (not all) we want to implement SSO, and authenticate their users against their active directory, so that they never see the login screen (unless the SSO authentication fails).</p>
  
  <p>Most customers won't be using this functionality.</p>
  
  <p>My first question is: is this do-able?  Is it possible to have an MVC application which uses both SSO and forms authentication?</p>
  
  <p>If so, can anyone point me to any links explaining the process?</p>
  
  <p>I've seen some good information, such as <a href="http://www.tuomistolari.net/blog/2014/3/1/journey-to-windows-identity-part-1-the-basics" rel="nofollow">this tutorial</a> but I can't find anything that matches my scenario.</p>
  
  <p>Thanks.</p>