I am running 3 Windows Hyper-V 2012 hosts in a cluster connected to a single PS Dell EqualLogic SAN. Plus SCVMM virtual server to manage VMs. I am looking to upgrade our host integration tools from version 4.5 to the latest 4.7 on all 4 servers. Do I need to re-enter the configuration settings or is this kept during the upgrade process? 

Is there any best practice to upgrading i.e. drain roles, upgrade individual hosts, then SCVMM server?