I have built a three-node exchange 2012 setup and it's working pretty well. Messages are replicating through all the servers/the DAG.
My servers are all Win2K8 SP2 and are named as follows:
Franklin0 (bare metal server using local disk)
Franklin1 (Virtual server using stored on the VM server)
Franklin2 (Virtual server tide to NAS)
I started with a virtual server (Franklin2) that was tied to my NAS. It wasn't very reliable and that's why I built the Exchange cluster and started using a DAG.
I also have a Linux box for my outside edge that forwards e-mail to the Exchange setup. Originally, when I only had 1 Exchange server, it was relaying all e-mail to Franklin2. I now want the primary Exchange server to be Franklin0 as it is the most reliable of all three of my Exchange servers (IMHO).
When I try to change my Outlook clients to Franklin0 or to the Franklin-DAG, it defaults back to Franklin2.
I also can't forward e-mail to Franklin0 or Franklin1. I get the following error:
franklin0.mydomain.com #<franklin0.mydomain.com #5.7.1 smtp; 530 5.7.1 Client was not authenticated> #SMTP#
I'm not Exchange expert and would appreciate any help at all.