About backing up Microsoft Azure virtual machines
You can either schedule a backup job or run a backup job manually. See the NetBackup Administrator's Guide, Volume I.
For overview of the backup process, See Backing up Microsoft Azure Stack VMs.
The backup process comprises of the following stages:
Pre-processing: In the pre-processing stage, the first backup host that you have configured with the BigData policy, triggers the discovery. At this stage, the VMs and associated metadata is discovered for backup.
Data transfer: During the data transfer process, one child job is created for each backup host.