I am erring on the cautious side....and I have read http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/SBS_Small_Business_Server/Q_26381052.html
Scenario - in place
SBS 2008 in place and when setup it was configured with remote.xyz.com
I would like to change it to remote.abc.com and I understand two things
a) To do it through IAMW
b) That I have the A record setup by the hosting provider...remote.abc.com pointing to my external IP address.
c) When setting up a new user account (john smith) then currently it defaults the email address to firstname.lastname@example.org - as expected
d) I have setup additional user accounts with the email address of abc.com and configured "Send As" from the main AD account that logs in.
if I go ahead and change FQDN domain to abc.com will it change all the ad accounts already setup to the default email@example.com?
This would be an issue as I have firstname.lastname@example.org already setup sending and receiving as listed in point D.
Hope the above makes sense