http://blogs.msdn.com/b/plankytronixx/archive/2011/01/11/video-how-windows-azure-app-fab-acs-and-adfs-2-0-work-together.aspxThis is a short video that describes how an on-prem ADFS 2.0  server, Windows Azure App Fab: ACS (Access Control Service), an AD Domain Controller and a WIF (Windows Identity Foundation) based app running on Windows Azure communicate with each otheren-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)