The Agent is supported for install on Unity (3.1.5), correct?
The Cisco Unity 3.1 System Requirements, and Supported Hardware and Software doc can be found here:
from that doc:
"VERITAS Backup Exec for Microsoft Windows NT and Windows 2000, version 8.5 or later. (Note that Backup Exec is not supported for backing up Cisco Unity servers when failover is configured.)"