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Active Directory Federation Services

Updated: May 11, 2009

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.

Help installed with Windows Vista and Windows Server 2008 is also available in the Windows Server 2008 Technical Library.

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