When you attempt to create a DFS link that points to a folder that is under a volume mount point, you receive:
The following error occurred while creating the DFS Link: The specified path is invalid.
Your System event log may contain an error similar to:
Event Type: Error Event
Event Category: None
Event ID: 14503
Description: Dfs could not create reparse point for share Path_Name mapped to directory \??\Drive_Name\Folder_Name. The return code is in the record data. Data: 0000: 000000a1
This behavior occurs because Windows Server 2003 DOES NOT SUPPORT creating a DFS link from a folder that is under a volume mount point.
To workaround this problem, attach to disks by using spanned volumes.