Hopefully you’ll never have a disaster hit your datacenter, but if you do, this guide can show you how to restore your vCenter database to your latest backup. Your vCenter database holds all the information you see in the vSphere Client and more. Although your VMs will still run your ESXi hosts without vCenter and its associated database, you lose a lot of enterprise functionality.
In my testing, I found the SQL server to which you recover can have a different name. I did not change the name of my vCenter server. All machines involved had different IP addresses and resided in a different domain. All domain service accounts were recreated in the test domain. I’m leaning towards the possibility that the vCenter server can have a different name, as well.