No ! BENT 8.6 does not support W2K3 !!
You could backup binary files - but no OFO and most of the Agents would not work.
Worst of all : The W2K3 Shadow copy components needed for recovery are unable to be backed up by BENT 8.6 !!
Besides: No support at all from VERITAS for BENT 8.6 on W2K3
Regards
uz