I have an ailing Exchange 2003 server on my domain that I am replacing with Exchange 2007 running on a brand new Server 2008 box. I've read the TechNet articles about the difference between an Exchange Transition and Migration. I've also read this 3 part walkthrough from MSExchange.org in detail.
I need clarification on the following points from anyone who has experience with this procedure:
- My understanding is that when I install Exchange 2007 on my domain, the existing Active Directory structure will be updated to make the E2K7 box my "primary" mail server for lack of a better word. Will the Exchange 2003 server continue to send and receive email for the mailboxes it hosts without any intervention on my part? Assume I have not yet made any NAT changes on my firewall. Also assume I have not migrated any mailboxes to the new server yet.
- When I do begin to migrate mailboxes from 2003 to 2007, I believe I should change my NAT rules to direct inbound mail flow and OWA traffic to the new Exchange 2007 server. Am I correct in thinking that the 2007 server will redirect traffic to the 2003 server for mailboxes it does not yet host?
- I currently implement Outlook Anywhere (RPC-HTTPS) on my Exchange 2003 server using an SSL certificate from Network Solutions. I assume I will need to get a new certificate for the new 2007 server, correct? Can anybody recommend a best practice for making this switch? Will my Outlook Anywhere implementation break when I bring Exchange 2007 online?
Any additional advice or best practice suggestions are welcome.