See also “How To Use File Replication Service File and Folder Filters in Windows 2000” from Microsoft Help and Support.
Abbreviated as FRS, File Replication service is a multithreaded, multiple-master replication engine in Microsoft Windows NT versions 3.x and 4.0. Windows 2000-based domain controllers and servers use FRS to replicate system policies and logon scripts for Windows 2000-based and earlier clients. The File Replication service replaces the LAN Manager Replication (LMREPL) service.
