The Virtual Server Agent can be installed on one or more machines, so that those machines can serve as VSA proxies. A VSA proxy manages backup and restore operations for guest VMs in your environment, eliminating the need to install agents on guest VMs.
You can install the Virtual Server Agent (VSA) on any virtual machine (either inside or outside the cluster environment) or on any physical machine.
For load balancing, you can deploy one or more VSA proxies.
You can configure application-aware backups using the Virtual Server Agent to protect application data without installing guest agents on virtual machines.