Procedure to update inventory/services after having changed vcenter server

We have to transfer ours ESXi from a vmware vcenter to another: once this is done what must we do in manageiq to update inventory? What happens to services creates with first vcenter?

When we tested migrating VMs between vCenters under CloudForms 3.2 we saw that if the VM has the VMware note

MIQ GUID=<the vm's guid in the cfme database>

then it was recognized as the same VM. Otherwise it showed as a new VM and lost its tags, attributes, and associations with services.

That ID is added when a machine is provisioned, but we had a majority of VMs that were built prior to us using CloudForms. For those we created a couple of automate methods that added that note to any that were missing it.