Microsoft Knowledge Base Article 312862 contains the following summary:
File Replication service (FRS) is a multi-threaded, multi-master replication engine that replaces the LMREPL service in Microsoft
Windows NT 3.
x
and in Microsoft Windows NT 4.0.
Windows 2000-based and
Windows Server 2003-based domain controllers and servers use
FRS to replicate system policy and logon scripts for clients that run Windows Server 2003 and earlier. You can also use FRS to replicate files and folders
between Windows 2000-based
and Windows Server 2003-based
servers that host the same fault-tolerant Distributed File System (DFS) root or
child replicas.
This article describes:
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How the deletion of FRS objects and FRS attributes
occurs.
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How to detect missing Server-Reference attributes and
member objects in SYSVOL replica sets.
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How to repair missing attributes by using null
Server-Reference attributes as an example.
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How to repair missing objects by using missing member
objects as an example.
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How to repair missing connection objects by using existing
connection objects as an example.
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