I have a new 2012 Hyper-V3 cluster, with SCVMM 2012 SP1.
Putting a Server into maintenance mode used to work, it would live migrate all the virtual servers off the host and pause in the cluster.
Also the new Optimise Host Feature also used to work.
Now all I get is this :-
Warning (23756)
Changes have been made which should be verified by running placement again.
Recommended Action
Use the Refresh Preview action to run placement again.
you can manually live migrate all the VM's of the host then put it into maintenance mode and all works fine !.
I do not understand what this "use the Refresh Preview Action" is. I cannot find any reference to this anywhere.
hope someone can help
many thanks
Mark Green