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Windows Server 2008 R2 DCPROMO - Active Directory says domain is already in use on network

Posted on 2011-03-01
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Last Modified: 2012-06-27
I am trying to make a new domain controller on a new network.  The system was a fresh install of Windows Server 2008 R2 with SP1 installed.  When I try to promote it using dcpromo it tells me the domain is already in use on the network.  There isn't even another machine connected to the network it is on so I am not sure what to do.

Any suggestions on what might be stored in the registry somewhere making it think the domain is in use?
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Question by:mswildma
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Expert Comment

by:Neil Russell
ID: 35008425
Has DCPROMO already failed once with another error and this is a second attempt or more?
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Expert Comment

by:JBond2010
ID: 35008453
What is the ip address for DNS pointing too?
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Expert Comment

by:JBond2010
ID: 35008596
I would suggest the problem might be with the ip settings.
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Author Comment

by:mswildma
ID: 35012315
I have restarted and tried DCPROMO so many times already I cannot recall if the first time there was a different error, although I don't think so.

The DNS settings for the NIC has been changed back and forth from it's own IP for when DNS gets installed to the IP of the router since DNS isn't installed yet.  It gets the same error either way.
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Accepted Solution

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mswildma earned 0 total points
ID: 35029359
It turns out the system didn't like what I put for the workgroup name.  I have used the same name with a "." as I planned to use for the domain so that anything I installed prior to AD would already have the correct suffix.  Once I changed the workgroup name to something else DCPROMO continued to install.
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Author Closing Comment

by:mswildma
ID: 35067726
I figured it out after trying different ideas.
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