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SBS 2008 changing external domain FQDN

Hi Experts
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.

Further caveats
c) When setting up a new user account (john smith) then currently it defaults the email address to john@xyz.com - 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 john@abc.com?
This would be an issue as I have joh@abc.com already setup sending and receiving as listed in point D.

Hope the above makes sense
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1 Solution
Cris HannaCommented:
Actually what I think you're actually asking is how to receive email for multiple domains?  Correct?

if that's correct, the answer lies here http://sbs.seandaniel.com/2008/10/hosting-multiple-domains-on-sbs.html
RobKanjAuthor Commented:
Hi Cris
Good to hear from you....I believe you have assisted me before.
No. (!!) I'm ok on send ing and recieving emails out on multiple domains - thats all configured. What I am trying to gt across is that when I first setup the server it has the default external domain as xyz.com...so any user accounts I create through the wizard is rob@xyx.com
I would like to change this to abc.com and I think I know the process

BUT what I am worried about is that will the existing AD accounts created all change the default email address to .......@abc.com. I donlt want that to happen as I have all the users email addresses amended within Exchange Recipients.

Also I have an A record discussion which I am going to post later this afternoon that is linked to this post and maybe of interest
All the best
Cris HannaCommented:
Simply re-run the Setup My Internet Address Wizard in the SBS console and enter the new domain name.

Going forward this would be the default email for new users.  

Then just verify in Exchange under recipient policies to see which one has the higher priority...you can edit them and adjust as necessary

Check a couple of existing users to see if the default (bolded) address is correct
RobKanjAuthor Commented:
Thanks Chris for the advise....all good

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