Backing up the Master server

Hi,

we currently have a master server on a virtualised windows 2012 box running Netbackup 7.6.0.4 along with a 5230 appliance running 2.6.0.4.  We have this setup at 2 different locations, they backup their respective sites and then replicate the backups to each other.  The catalog files are also replicated to each other 

The question i have please, is how should we go about backing up the virtual master servers.  We are using the VMware plugin to backup up our other virtual servers, so can we just backup the master servers this way?

many thnaks.