We are currently running exchange 2010 in a DAG setup using 2 servers(windows 2008R2 ent) in a cluster and have been for over a year now.
We now have a problem, where we have rebooted one of the 2 nodes in an win 2008R2sp1 exchange 2010 DAG setup, and once rebooted, the node is failing to join the cluster!
Event logs reported issues with not being able to see the share file witness server, but in failover cluster manager under Cluster Core Resources, is is showing as both cluster name - DAG and witness server online! but the node under nodes, is unavailable.
If someone could please help, as this is a production server so we are keen to get this working again
We have not attempted to reboot the other node in case we end up in a worse situation than we are now.