setting up another domain on windows 2008

for my new domain to be setup on dns I need another domain to be setup - how do I do that forest doesn't do the trick - or is there another way?
halinabAsked:
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KCTSConnect With a Mentor Commented:
To demote the cd, get a command line and type DCPROMO
if you get an error then repeat with DCPROMO /forceremoval


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KCTSCommented:
Can you please explain exactly what you are trying to do.

If you are trying to set up a new domain in an existing forest then when you DCPROMO the new Domain controller, point it at the existing domain controller/DNS server for its DNS and select

New Domain Controller for New Domain
New Child Domain in Existing forest
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halinabAuthor Commented:
yes but that gives me  a name that is a sub of the parent - i'd like a completly new domain name
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KCTSCommented:
OK if you want a completly different domain name then you have need to set it up as a new domain in the same forect , assuming that you want the domains to trust each other.

Alternatively you can set up a completly independant domain, new domain, new forest (they will not trust each other - but you could then create a trust between them if needs be)
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halinabAuthor Commented:
Please direct to me to how to do this
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halinabAuthor Commented:
i'm not sure what you mean - how do I add a completly new domain from say server manager
sorry newbie to servers
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halinabAuthor Commented:
ps I can setup under the olds domain - know how to do that - can I then use a command to upgrade it?
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halinabAuthor Commented:
I also have mail exchange which seems to be stopping me from doing this - any thoughts?
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