I have a client that is using Exchange 2003 on SBS 2003 R2, but only for calendar sharing and contacts sharing. Their email is still coming to their clients via a POP3 account on each client's Outlook.

I'd like to move them over to using Exchange for both email and the other things they are utilizing it for now. Can you folks guide me in the right direction?

The setup:

• external domain is akin to domain.com (and is where they get their POP3 email from now)
• internal domain is akin to domain.local
• only simple hardware firewall (no ISA)
• static external IP is available to use

My "assumptions":

1. Setup SMTP default connector in Exchange for their existing external domain
2. Have their existing email backed up to PST files (just in case)
3. Setup the new MX records to point domain.com to the static external IP

I'm a little confused how I'm going to setup their existing Exchange accounts with the proper SMTP address though. Right now it is just [email protected]. Do I just need to modify or create a new recipient policy?

Are there other steps involved that I'm missing? Anyone with a walkthrough or even a basic "steps" is fine. I'm fairly used to Exchange 03, but I've been on Exchange 07 for a while now so going back is the weird part...plus I don't know what issues Exchange 03 on SBS has versus the normal "version".

Thanks for all the help!