we've got following setup:
One vCenter Standard Server named vCSA with three hosts attached (Enterprise Plus licenses) with shared storage attached.
One VEEAM Proxy server. because the proxy server can serve all three hosts and has access to all datastores the hosts have got.
One vCenter Essentials Server named vCSAe with three hosts attached (Essentials license) each host has got only local storage.
One VEEAM Proxy server for each Host.
Backups are working like a charm.

Today I had to restore one VM which belongs to vCSA.
After starting the restore job I first received an error. This forum helped me to get rid of it, switching the Backup Proxy on VCSA from Appliance to Network mode.
Now the VM is getting restored.
A couple of minutes after starting the job users complained about poor performance of VM running on one of the essentials hosts.
Because they shouldn't have something to do with the restore job I first thought one of the users would've been using lots of resources.
After starting vCenter and connected to vCSAe i noticed one of the backup proxies claiming a huge amount of of resources.
As it appears VEEAM restores the VM for vCSA over the backup proxy on vCSAe.
Has anyone got an idea how this can happen or how I can make sure VEEAM is going to chose the right proxy in future?
Thanks for your support
John