For a new or existing subclient, you can define rules or select objects to include or exclude virtual machines.
Automatic discovery enables you to automatically select virtual machines for a subclient based on criteria such as a VM name pattern, power state, cloud service (for Azure Classic), or resource group (for Azure Resource Manager).
Filtering enables you to exclude virtual machines based on similar criteria. You can define filters on a subclient (only applies to that subclient) or on a backup set (applies to all subclients under the backup set).
By combining automatic discovery and filtering, you can precisely target virtual machines to be included for each subclient.