SYSVOL Replication Migration Guide: FRS to DFS Replication

• SYSVOL Replication Migration Guide: FRS to DFS Replication

Domain controllers use a special shared folder named SYSVOL to replicate logon scripts and Group Policy object files to other domain controllers. Windows 2000 Server and Windows Server 2003 use File Replication Service (FRS) to replicate SYSVOL, whereas Windows Server 2008 uses the newer DFS Replication service when in domains that use the Windows Server 2008 domain functional level, and FRS for domains that run older domain functional levels.
http://technet.microsoft.com/en-us/library/dd640019%28v=ws.10%29.aspx