I am performing an in-place migration from a Windows Server 2012 Failover Cluster to a Windows Server 2012 R2 Failover Cluster. In the documentation for "Hyper-V Cluster Using Cluster Shared Volumes (CSV) Migration", in the steps to "[R]un the virtual machine on new cluster," it specifically says to "Turn off the virtual machines that have been migrated over to the new cluster." I cannot believe it is recommending to actual use the "Turn Off" option, since that is tantamount to pulling the plug on the system. What I can't seem to find is any guidance on whether the virtual machines can be saved or whether they must be shutdown to successfully complete the migration.
Anyone have any experience with this cluster migration, specifically with respect to the state of the virtual machines on the original cluster node/new cluster node?