I've had a 2-mailbox DAG running for a couple of years, and now I'm getting ready to retire the hardware & move the servers to VMs.
MB1 & MB2 are running Exchange 2010 SP3 on Windows Server 2008 R2.
MB3, the one I'd like to add, is Exchange 2010 SP3 on Windows 2012 and is a virtual guest.
All three mail servers are visible in the console, and I can create mailbox databases on the new server, no problem. However, I just can not get MB3 to join the DAG. When I try to add it I get a vague error "Failed to initialize cluster with error 0x80004005."
Is there any compatibility issue you can think of that would be causing this problem? I've checked permissions, ran the cluster config check on the VM, confirmed the IP addresses are fine - just can't find what I'm missing!
Any thoughts would be sincerely appreciated.