one of engineer has done some mistakes with Exchange 2013 on Vmware. they have one CAS server and one mailbox server.
They had Exchange 2013 Cu2. they have upgraded in to Cu6 last week. Later they applied the snapshot.
now exchange server have Cu2 right now. But Active directory has information mentioning CU6.
Now we want to recover it .
I made below action plan
1) install new exchange servers. ( different host names and IPs) Both CAS and mailbox.
2) add in to domain.
3) install exchange 2013 servers with CU2
4) configure DAG between both mailbox servers.
5)add mailboxes in to DAG.
6)wait till complete the sync
7) point all the Autodiscover, webmail, smtp in to new servers.
8)then run the Disaster recovery switch with old exchange servers.
9)then remove the old servers.
is this ok ?