title: Single sign on to remote Forms Authenticated site
body: <p>We have an external facing Forms authenticated site.</p>
  
  <p>A new client has requested that they don't want their users to have to maintain (remember) and enter credentials to our site, and that they should just be able to log-on seamlessly using their Windows network credentials.</p>
  
  <p>Last time I checked, this was just not possible, but I wondered if anyone had had a similar requirement and how they achieved it. </p>
  
  <p>Should we be investigating using a SSO provider?</p>