You can register for the Backup Exec 2010 Beta here.
https://www-secure.symantec.com/connect/events/announcing-backup-exec-2010-public-beta-dedupe-everywhere
Alos since you already have the valid service/maintenance agreements you can also contact ...
Please verify the versions of files on the win2k8 R2 server as per document:
http://support.veritas.com/docs/331998
For the non domain controller backup, check if c:\windows\system32\cba\pds.exe exists or not. This generally caused if you uninstall...