Clustered Hyper-V VM cannot be moved to another cluster node

Hello everybody,

I just encountered the following problem:

One of our customers is running two physical Win 2008 R2 SP1 Enterprise Servers which Hosts to a couple of clustered Hyper-V VMs.

Let's say one of the servers is called SrvVirt2, the other one SrvVirt3.

We have to shutdown SrvVirt2 due to some hardware servicing which has to take place, so we began to move the virtual machines hosted on this machine to SrvVirt3. All of them could be moved without any problem, but there's one single machine which we cannot move to the other cluster node.

A couple of seconds after we start the move in Cluster Manager, the system issues the following message:

Error Code: 0x80071398 The operation failed because either the specified cluster node is not the owner of the group, or the node is not a possible owner of the group

We have checked everything over and over. SrvVirt2 and SrvVirt3 are both possible owners of this specific VM.

BTW, it doesn't matter which way we try to get the system to the other node. Move, Fast Move, Live Migration: It all ends up with this message.

Is there any idea or suggestion what we could do so we can move the VM to the other Hyper-V Cluster node?

Kind regards

Alex