SBS2008 domain name change

Please can you help we have changed our domain name from:
to       (the dog quit!)

I have gone into Exchange management console and changed the email addresses to the new domain and made the new email address the "reply to" and that is working perfectly.

I would like to change the domain name within the whole system, can I just go to the:
 "getting Started Tasks" in the Windows SBS Console and run:
"Setup Internet address"
"Configure a Smart Host for internet e-mail"
Will that reconfigure all or will I endup with a great big mess?

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BlueComputeConnect With a Mentor Commented:
Hi Sam,

I think PaulD77, above thinks you want to change the internal domain name, which isn't what's needed in this situation. To fix SBS to use the new domain for everything email-related, simply run the "Set up your internet address" wizard from the SBS Console, this'll actually re-do the bit's you've already done in Exchange but that's not a problem - in SBS use the wizards wherever possible as it can get confused otherwise, and it makes life much easier.
This will change everything outward-facing to use the new domain, the only bit that can't be changed is the internal name of your domain - this is shown in Computer Properties as the second bit of the computer name - usually <something>.local, in your case possibly dog-cat-mouse.local, although something else may well have been used.
Don't worry about the smart host, or connect to internet wizards, neither deal with any settings that need to be changed.
take a look at this article before you change any internal domain name, theres alot you can mess up.  You are better off rebuilding or running dcpromo to remove AD etc.
samcoryAuthor Commented:
Thanks for you help, sorry I did not come back earlier but I was waiting for the weekend before trying. Everything worked.

Thanks again
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