We are migrating to Office 365, currently not all mailboxes are removed and we are running in a hybrid configuration (Exchange Server 2013 for the hybrid). We are also moving data centers and I want to remove my current environment from 5 server to 3 as per below:
1. Reduce mailbox servers from 2 to 1
2. Reduce CAS/HUB from 2 to 1 (this is not an issue as I can uninstall role on one)
3. ISA server (no issue as I will move it along)
I need to know how could get rid of one mailbox server and the cluster. I know how to do this with CCR cluster but I am in a SCR cluster.