Active Directory Federation Services
Applies To: Windows Server 2008
Active Directory Federation Services (AD FS) is a server role in Windows Server 2008 that provides Web single-sign-on (SSO) technologies to authenticate a user to multiple Web applications over the life of a single online session.
Planning and Architecture
Help installed with Windows Vista and Windows Server 2008 is also available in the Windows Server 2008 Technical Library.
Windows Server 2008 TechCenter: Active Directory Federation Services
TechCenters provide links to content outside of the Technical Library, including Knowledge Base articles, downloads, technical articles, and other resources.