If you perform an incremental backup of Microsoft Dfs root with dfsbackupmntpnt=yes specified, Tivoli® Storage Manager backs up only the junction points, not the subtree under the junctions.
If you want to traverse the Dfs tree and back up the files and subdirectories of any junction it encounters, specify the dfsbackupmntpnt=no option. If you want to backup both the Dfs tree structure and the date contained in the Dfs tree you must run two backups: one with dfsbackupmntpnt=yes and one with dfsbackupmntpnt=no.
This option has no effect if you are backing up individual junctions. The exclude.dir option behavior for Dfs junctions is same as for mounted virtual volumes.