how to add domains in windows server 2008

I would like to know how to create virtual domains.
I have a domain DOMAIN on my system (names are changed to protect the innocent).
I would like to add DOMAINDEPT to the enterprise as a, for the lack of better terms, subdomain.
What I want to do is enable on of my departments full domain priviledges on their "subdomain", but I can protect the rest of DOMAIN outside of it.

Is this possible? if so, how do I do it?
Evan CutlerVolunteer Chief Information OfficerAsked:
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David Johnson, CD, MVPOwnerCommented:
In active diretory we have
forests, domains, subdomains
You can create a domain in a new forest, add the domain to the existing forest or create a subdomsin i.e. is a subdomain of what you seem to want to do is create a new domain in an existing forest or create a domain in a new forest

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Evan CutlerVolunteer Chief Information OfficerAuthor Commented:
I have people who I would put in the "subdomain" who need domain privileges.  I do not want to give them domain admin privileges to the parent network.  They purchase computers and attach/detach at will due to some wierd form of mobility aspect.  I was thinking about adding a subdomain, and giving them their own sandbox for them to break without take me down with them.

Would this be practice?
David Johnson, CD, MVPOwnerCommented:
a domain admin only has privileges on that particular domain, and enterprise admin has privileges on the entire forest
Evan CutlerVolunteer Chief Information OfficerAuthor Commented:
Thank you very much.
I will start my development from there.
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Windows Server 2008

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