Is this still the case?   Or is there a way around the DOS SUBST command?

On Wed, 22 Nov 1995 Pieter Groen said:
>In the 'User's Guide and Reference for Microsoft Windows' (SH35-0125-02)
>on page 93 (Selecting drives within Chapter 4) there is a warning:
>   "ADSM client does not allow drive aliases created with the DOS SUBST
>   command to be backed up. In addition, since the aliases drive has the
>   same volume label as the physical drive it aliases, the client is not
>   able to back up the physical drive. Drive aliases created with SUBSt
>   should be deleted prior to starting Windows."