Smarts ESM & VirtualMachines not monitored via the VMware API

We have found that when ESM does its topology sync with the IP Suite, that VirtualMachines not discovered via the VMware API do not get their VMVirtualizes relationship or SNMPAddress set.

We started doing this ourselves with a posthook asl, but then found that EMC - in their asl esm-post - deletes all VirtualMachines not discovered via the VMware SDK (API it would seem).  It checks the property DiscoveredViaSDK for each VirtualMachine instance.

After logging a Support Call with EMC, we were told that VMware systems discovered via the VMware API and VMware systems discovered via SNMP should be in different ESM domains and not share an ESM domain, i.e. ESM does not support mixed VMware discovery.

Has anyone else come across something similar?