V-449-1334 Backup Exec found servers that do not have the Agent for Windows installed on them. The Agent for Windows is required to backup the servers.
UMI Code : V-449-329
UMI Code : V-449-330
The Agent for Windows is required to backup the servers
Install the Backup Exec Agent for Windows on the problem machines.
Or
"Discover Data to Back Up" check can be disabled using following steps :
Go to Backup Exec Settings --> Discover Data to Back Up and un-check "Discover servers that have data that has not been backed up"

