Virtual Machine aren't categorized as VM

Hy, i am using OCS for many years - but i can't figure out how to see which machine is virtual and on which host the machine is running.

In the GUI i can see an Icon whith ne name VM - but it is greyed out.

OCS Server is 2.1.1 (Linux)

Agent 2.05 - but 2.1.1.1 also did not work (windows clients)

I searched the whole internet for many hours - but i can't any manual for this  - any help ?

Thanks in advance