A virtual Email Security - Server appliance is a virtual instance of a physical Central Management System appliance. It manages a virtual appliance the same way it manages a physical appliance, but requires no hardware. The same virtual Email Security - Server appliance can manage both physical and virtual appliances.
For information about deploying and working with virtual appliances, see the Trellix Device Deployment Guide on the Trellix documentation portal at https://docs.trellix.com/.