Follow the below screenshots to configure vmware backup policy in Symantec Netbackup. The NetBackup for VMware provides backup and restore of the VMware virtual machines that run on VMware ESXi servers. NetBackup for VMware takes an advantage of VMware vStorage APIs for data protection. The backup process is off-loaded from the ESXi server to a VMware backup host.
I will always prefer to select VM host using automated selection instead of manual, which you can find from the below screenshot and while selecting the same use Display name to select the VM’s instead of using hostname, because if you use a hostname as a selector sometime you will find a DNS issues. At same time if you have selected the Display name then you should not change it in the VMware Vcenter, if it so then backup will fail due to not able to find the display name selected in the backup policy
Now you have configured the vmware policy to schedule the backup. But please note in vmware policy the important one is transport mode which gives you the good data transfer rate as per to the transfer mode you select. Normally i use in my environment is nbd its nothing but via network.