8.6 RU2
"Asset types" are retreived from "Resource type" table:
Resource types are defined during the "Basic inventory". You can find it under Resource Manager> Inventory> Basic Inventory >>AeX AC Resource Inventory Summary.
Currently, ITMS detects VMware, VirtualPC, and Nutanix as Virtual Machines. Other Virtual machines are not detected yet and probably will be available in our next releases.