I am have been having issues creating a DAG in Exchange 2013.
I have a scenario where I've got 2-DCs, 1-FileShare (non-exchange), Four Exchange Servers (1-CAS, 3-MBX).
I successfully create a DAG and try to add two servers to it. On each attempt, the CAS server adds without issues, but the MBX server fails to add with the following error:
A server-side database availability group administrative operation failed. Error The operation failed. CreateCluster errors may result from incorrectly configured static addresses. Error: An error occurred while attempting a cluster operation. Error: Cluster API failed: "AddClusterNode() (MaxPercentage=100) failed with 0x5b4. Error: This operation returned because the timeout period expired". [Server: cas01.rshq.local]"
How do I get the second server to add so I can complete the DAG creation please? Looking forward to your help on this as I've been on this for over 2 weeks and can't seem to find a solution anywhere that works.