You can actually get that info out of VMware if that's any easier. CommVault sets a Last Backup attribute for each VM. You can view the VMs for a host or for a datacenter, then add the field named "Last Backup". Up until vSphere 6.5 you could even sort by that field. If you are on 6.5 you can export the VMs into a CSV file and sort or filter via Excel or whatever as an alternative.
If you've got some background in PowerShell, you can query your vCenter for this info that way too, outputting it to straight text, csv, etc.