Hi,
At work we have 3 servers within a cluster (Windows Server 2012 R2). On Monday the cluster failed and started to live migrate boxes to servers which were rebooting. We had a major site outage, where our proxy, exchange and lync went down. In the Failover Cluster Manager all the virtuals were stuck saying "loading", the only console which was working properly was "Hyper-V Manager". . We managed to get everything back up by rebooting each server to allow it to install Windows Updates.
On Tuesday, we had a similiar outage which was caused by one of the servers trying to take ownership of a store. The cluster then went into a "zombie state", which only occurred when the 3rd node was on. We now have a option where we can evict the node from the cluster and add it back in.
Any ideas why this might have happened?