this is my scenario:
A customer of mine has two servers, a sbs 2003 and a 2008 std. the 2008 is not connected to the domain (but all the clients are). The 2008 works as fileserver and also hold their applications. The sbs 2003 is managing the domain ofcourse and they use exchange but only locally, and by locally i mean each user is connected to the exchange for calendar sharing and storing mail but they have a pop3 account to reciev and send mail. They dont use any other services on the sbs 2003. The firewall in the building is handling DHCP and DNS.
The case now is that the sbs 2003 hardware is getting old so i have sold a new sbs 2011 to them and im asking for your opinion wether i should make a migration from sbs2003 to sbs 2011or just disconnect the sbs 2003 and make a clean install of the sbs 2011 and create a "new" domain and reconnect every client with all the work that means with user profiles and so on.
My plans are to use the new sbs 2011 like they used the old sbs, only locally, but in time point their mail directly to their server instead of using pop-accounts. I also plan to connect the 2008 std server to the domain to make the user handling easier.
If you recommend to migrate, what is the best way to point the exchangeclients to the new server. Im thinking about the fact that when the old exchange isnt there they will keep poping mail to their .ost files and they will dissapear when disconnecting client from the old exchange and connecting to the new one.
I should also mention that i havent done any server migrations before and thats why im posting here to get some recomendations.