I attempted to submit a support request first, as we are paying for support, but we are still using version 9.5 of Veeam B&R which is no longer supported. We cannot upgrade due to external integrations that don't support newer versions of Veeam yet.

I have Veeam B&R installed on a vm on 172.16.200.x network. The vms I want to verify are all on 192.168.3.x network.
Is it best practice to setup the production network of the proxy appliance on the 192.168.3.x network and add a static route? Or would it be better to setup the production network on the 172.16.200.x network and add static mapping to the specific vms?
My understanding from the documentation, is that if the production network matches the network of the Veeam server, the route is created automatically. When I set up the proxy appliance on the 172.16.200.x network I can see the route gets created from the logs but it cannot resolve the IP of the vms on the 192.168.3.x network. From the 172.16.200.x network, I can ping any vms on the 192.168.3.x network so I am not understanding why it can't route inside the virtual lab.
I may be misunderstanding how the routing works, so any insight would be greatly appreciated!