The Sysvol folder on a Windows domain controller is used to replicate file-based data amongdomain controllers. Because junctions are used within the Sysvol folder structure, Windows NTfile system (NTFS) version 5.0 is required on domain controllers throughout a Windowsdistributed file system (DFS) forest.This is a quote from Microsoft themselves basically the domain controller info stored in files likeyour group policy stuff is replicated through this folder structure.
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