Hi,
We recently retired our remaining 2007 MSX servers and were left running with a pair of 2013 MSX (SP1) servers in a DAG. We bought two new servers and installed Server 2012 and MSX 2013 with the latest CU with the intention of creating a new DAG, new mailbox databases and moving everyone to the new machines.
I finally got the new machines installed and patched, then this morning I went to create the DAG. It seemed to create OK, but when I click on it in 'database availability groups' the right hand pane shows 'Object reference not set to an instance of an object'. I have added the two new servers into the DAG successfully though.
I did select Configure DAG networks manually (not sure if that is important).
I can find a few articles on the net with similar issues, but none of the suggestions seem to work. I initially had IPv6 unticked on the MAPI nic's but turned this back on, we also tried restarting the clustering service on the machines and rebooting, but none of this has made a difference.
I am planning to leave it for a couple of hours in case this is a replication or other issue, but I was wondering if anyone had any other ideas on what to try to get this working?
Next step will be to delete and re-create the DAG.
Thanks in advance.