I got the following error in enent log while the backup is in progress please provide more information on this issue Note its Windows 2008 sever.
Event Log :[138:716] 11 license(s) need to be purchased for category "Encryption Extension for one client system". Run "omnicc -check_licenses -detail" for more info.
I'm guessing you are running DP 6.11 or earlier because this license reporting inaccuracy is rectified in 6.2. As zigoze said, ignore it if you are not using ecryption in the Disk Agent.