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First DC in new Tree

Last Modified: 2012-05-09
Guys, Im going to add the first DC to a new domain tree in my forest (win 2008 R2). It will create a trust with the parent domain. Does this new DC need to be apart of the parent domain before I dcpromo it?

I tried to DCpromo it as a stand alone in no domain and got error:
The operation failed because:

Failed to create a trust with domain Kratos.lan on the parent domain controller sd-2k3dc01.wfinet.com

"The specified account already exists."

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