We're adding a 2nd Exchange 2010 server in our main office. In the past I've just added a new server, moved everything to the new one, and decommissioned the old one. This time I want to keep both servers and split our databases up between them.
I've attempted some research on this but I keep ending up seeing CAS arrays and DAGs but I'm not sure we need those since they seem to be more than I'm looking for.
1) OWA and Activesync. Will the servers just magically know how to handle this or will I need to configure? For example, someone connects to OWA which goes to the new server, but their mailbox is on a different server, will the first server automatically know how to proxy that connection? Exchange does seem to magically know how to route things I've found.
2) Should I/Can I leave the CAS role on the old server? Remove it? Does it matter?
I'm just not sure I'm searching the right terms to find the info I need.