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AD Domain issues

Posted on 2004-08-25
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Last Modified: 2010-04-14
In a windows 2k AD environment I had one server loose it's IDE controller and hard drive. I have since replaced the parts and trying tobring this server back into the environment. My delima is that we were not able to demote the server before it crashed. Siezed roles to a domain controller within the domain. When attempting to bring this server back into the domain I get  an error stating that it could not connect to the domain and to choose another one.  

If at apossible we would like to be ableto include it with out having to completely rebuild this internal domain. We have changed DNS, Renamed the box, even tried a different IP address.

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Question by:Kenneth_Canova
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by:saito1
ID: 11900081

if it was not only DC in your domain reinstall it and make DC with same comp name and IP address. it will work without any problem. ( I have made this 2 days ago)
but if it was only DC in your domain then you need to reinstall it with same name, IP etc., promote, install DNS etc (anything else that was installed on this server) then start it (directory services restore mode) then restore system state then restart. you will have your old dc.
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by:Kenneth_Canova
ID: 11904382
I've done that already, and it didn't work. The error i'm getting is "the domain can not be contacted or does not exist please choose another one(if this is a new domain it may not be listed in DNS).

The part that confuses me is that when browsing for the domain it is listed, we then select it and try to move on with the same error as above.
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JonIU17 earned 500 total points
ID: 11918621
Since you have at least one other domain controller, make sure that all 5 FSMO roles are on another DC, AND if you have more than one DC left, make sure they are consistent on all of them.  (The easiest way to tell is install the Win 2K support tools and type netdom query fsmo from a command prompt.)

Next, delete the old computer name from DNS and WINS so all references of it are gone from name resolution.  IPCONFIG /flushdns on all other DC's and nameservers on the domain.  (There are other DNS servers, correct?)  

Next use ADSI edit to remove the decomissioned DC from the active directory.  Then boot up another DC into Diretory Services mode, and run a metadata cleanup to remove any other references to the decommissioned DC to the Active Directory.  Make sure all changes replicate out to all DC's - you should now be able to rejoin it to the domain and make it a DC again.  Above, a comment was posted to use the same computer name and IP address - do not.  The domain will "think" there are 2 domain controllers with the same name, and you'll find that little by little you'll loose some functionaliy.  Good luck!
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