Lori,
You don't mention which NBU version you are using, but here's where the details are held for these NBU versions:
1) NBU 5.0 - C:\Program Files\VERITAS\Patch\History.log
2) NBU 6.0 - C:\Program Files\VERITAS\NetBackup\Version.txt
These details are also held in the Windows Registry of course.
Before I upgraded to NBU 6.0 I created a couple of scripts to do the hard work for me. One scanned through a text file containg my client hostnames and checked the contents of the relevant file listed above and dumped the results to a csv file. The 2nd script talked to a container in our AD and checked a couple of values in each of the remote client's registry, and dumped the results to a csv. Hey presto after a few minutes I have all the details.
Maybe there should be somewhere within the Symantec TN where people can upload their scripts for other to use??
Colin.