We currently have Exchange 2013 CU7 running on a single server with Hub Transport, Client Access and Mailbox roles.
The server is running Windows 2012 R2 Standard.
This server has mailboxes on it.
I was wondering how easy it would be to introduce another Exchange 2013 server and setup a DAG?
Could I install Exchange 2013 CU7 on another server, setup Failover Clustering on the existing and new server and then create the DAG?
Can the existing mailboxes remain on the existing server whilst this happens or would I have to setup the new server, move the mailboxes to it and then reconfigure the old server to be part of the DAG?
Also can the Hub Transport and Client Access roles remain on the existing server we have? Also can I move these?