You can create a filter for a VM group to exclude VM disks from backups.
From the navigation pane, go to Protect > Virtualization.
The Virtual machines page appears.
On the Hypervisors tab, click the hypervisor.
The hypervisor page appears. The VM groups area displays summary information for any existing VM groups.
Click the VM group that you want to create a VM disk filter for.
The VM group page appears.
In the Content section, click Manage.
The VM group content dialog box appears.
The Disk Filters tab shows disks to be excluded from backups.
On the Disk Filters tab, to remove a filter, click in the Actions column of the row for the filter and select Remove.
To exclude virtual machine disks, click Add disk filter.
In the Add disk filter dialog box, provide information for the rule:
From the Disk filter type list, choose one of the following:
Virtual device node: Select this option to filter a specific device node.
Select a disk controller from the Controller list, and type an integer for the controller channel in the Location box.
Virtual disk name/pattern: Type a pattern for the names of disks to filter.
For example, you can filter disks using patterns such as VMName.vhd or VMName.vhdx.
To edit a rule, click in the Actions column of the row for the filter and select Edit rule.
Click OK to save the changes to VM group content.