I posted the other day on adding Exchange 2007 to an SBS 2003 environment, but for some, there is also the desire on how to remove the Exchange component on SBS 2003.  Obviously there are the install / uninstall options from the SBS setup screens that can be accessed through add/remove programs, however because SBS has the 1st Exchange server in a group you need to go a bit further.

More information can be found on how to remove the first server via http://support.microsoft.com/default.aspx?scid=kb;EN-US;822931 which discusses "How to remove the first Exchange Server 2003 computer from the administrative group".  In this KB article it tells you how to:

• Replicate all public folders to another server
• Rehome the Offline Address Book folder
• Change the server that is responsible for generating the Offline Address List
• Rehome the Schedule+ Free Busy folder
• Rehome the Organization Forms folder
• Rehome the Recipient Update Service (RUS)
• Designate another server to be the routing group master
• Create another Site Replication Service (SRS) instance
• Rehome connectors to another server
• Move mailboxes to another server
• Remove the first Exchange Server 2003 computer

I hope this helps - once again, I have not done this :-).  As is often the case, this information came from two other people - Karan and Chris Puckett, who is often seen on the Official SBS Blog.  Karan also tells me that he has helped a partner start to document this process at www.msexchange.org/tutorials/Installing-Exchange-2007-Small-Business-Server-2003-domain-Part1.html.

ttfn

David