Alright so here's what I've been tackling...
We have 10 of our servers on Proxmox hosts, it looks like this:
Host 1: 5 servers
Host 2: 5 servers
Host 3: Backup, before we bought Arcserve
Recently, we decommissioned Host 3, but wanted to upgrade our Proxmox version as it was still running 4.4...