Microsoft provides the Microsoft File Server Migration Toolkit (FSMT), which you can download from Here . The tool lets you migrate shares and data from any server running Windows NT 4.0 or later to a Windows Server 2003 (or Windows Storage Server 2003) machine.
The utility also interfaces with DFS, which lets you maintain the original UNC path of the data and avoid complications with accessing data once it has been migrated. However, Windows Server 2003 Enterprise Edition lets you maintain the original UNC path, and if the old UNC path doesn’t need to be maintained, DFS isn’t required.
