We currently have an Exchange 2013 environment with two servers and a DAG. This environment was setup by a 3rd party and this is the first time I've ever supported and Exchange environment with a DAG so I am trying to troubleshoot something that I'm not even sure is an issue in the first place. We currently have two databases in the environment, the "main" mailbox DB1, currently showing as Active on Server 2. and the DAG DB currently showing as active on Server 1. The "issue" that we have ran into is that when our help desk guy creates a new user in Exchange it was defaulting to the DAG DB as the Mailbox Database. I looked into this and tried applying:
Set-MailboxDatabase Ex13DAG -IsExcludedFromProvisioning $True
Now when he tried to create a new user he is getting, Error, Load balancing failed to find a valid mailbox database.
So my first question is, is it really an issue to worry about in the first place that the new users are defaulting to the DAG database, and second, if we should want the new users to automatically default to the non-DAG/main mailbox DB1. If we should want it to default to DB1, is the error he is getting due to the main mailbox DB1 being active on server 2 and not server 1. He is trying to create the new users on Server 1.
Any help is much approeciated.