Hi,
Thank you for your reply. Like I said a VMWare retailer guided me to install vCloud Usage Meter so I could find out an approximation how much our current state of virtualization would cost by using VSPP license. I clearly told them that we are using a few free ESXi hosts with vSphere. Maybe he had no idea what he was talking about..
But I found something in the manual too:
vCloud Usage Meter User's Guide
vCloud Usage Meter 3.1
Page 19
Add vCenter Server Instances
To begin metering, you provide a host name and credentials for at least one vCenter Server. You can add
one or more vCenter Server. You can also add ESXi hosts directly, although this is experimental, whether or
not they are managed by a vCenter Server instance.
.