Final Error: 0xe000942a - Backup Exec did not find any resources to include in the backup. Check the backup selections for this job to make sure it includes resources that are available for backup

Hi,  If there is antivirus running make exclusions for the following processes:

C:\Program Files\Symantec\Backup Exec\beremote.exe
C:\Program Files\Symantec\Backup Exec\beserver.exe
C:\Program Files\Symantec\Backup Exec\bengine.exe
C:\Program Files\Symantec\Backup Exec\benetns.exe
C:\Program Files\Symantec\Backup Exec\pvlsvr.exe
C:\Program Files\Symantec\Backup Exec\BkUpexec.exe
C:\Program Files\Symantec\Backup Exec\RAWS\beremote.exe  
also beremote on the desktops

Try running a repair of the Backup Exec installation from Programs and Features.

Does this job include all the desktops in one selection list?  Try running a smaller job 

If this doesn't help I recommend creating a support case so this can be investigated.