Where does the VM hostname come from?

I have a  VM policy. If I click "add client," then click "Browse for Virtual Machines," a list of the VMs shows up.

My question is this: Where does it get the information it populates into the "VM hostname" field, and also the "Display Name" field?

We have VM hosts that have the hostname; we have them with the FQDN; we have them with the IP; and we have them blank. We are trying to figure out where in VMware these fields are pulled from so that we can make them standardized (i.e., all hostnames).

Thanks in advance,

Susan