title: Single Sign On (SSO): How to use Active Directory as an authentication method for CAS service?
body: <p>I am developing a portal to Liferay and want to apply there a Single Sign On mechanism (SSO). I am using <a href="https://wiki.jasig.org/display/CASUM/Home">Jasig CAS</a> for centralized authentication of my multiple web applications. Until now I know that I am able to use CAS as an authentication method but the next step would be to add some more intelligence and ask the authentication from an <b>Active Directory</b> server. </p>
  
  <p>This should be possible by using AD as a "database" towards which the authentication is made, but I am new on these things and do not know how to make this with Jasig CAS.</p>
  
  <p>Any clue how to accomplish this task?</p>