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Removing an additional domain out of AD and Exchange

We currently have 5 domains that are additional to our core domain. We need to remove one of the domains and want to be sure it is done correctly in my environment. We have a 2003 R2 domain with a 2008 Exchange 2010.

- remove from AD
- remove from DNS
- remove from exchange

If anyone has a good link to provide I would appreciate it.
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Techneut
Asked:
Techneut
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2 Solutions
 
TechneutAuthor Commented:
Would following the steps below be the only procedure to take?

http://support.microsoft.com/?id=230306
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AmitIT ArchitectCommented:
KB is ok, but use the DCPROMO to do it. As mentioned in the KB. Meta cleanup is the last option. If you can share the design. Will review it again. If any change required will let u know.
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TechneutAuthor Commented:
I found that the article does not do what I wanted it to do. When looking for the domain, it does not pull up it only shows my primary domain.

Question: Can I just go to the OU in AD and delete the domain, remove all addresses in DNS, and unmount the database in exch 2010?
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AmitIT ArchitectCommented:
Deleting OU will not going to cleanup the AD or Exchange. Remove AD or Exchange is different process.

For AD removal , DCPROMO is the only command or metacleanup. With DCPROMO you can use /forceremoval if DCPROMO is not allowing to remove. Later clear it from AD and DNS also

For Exchange, first option is to use ADD/Remove program. If you want to remove it manaully follow below article.

http://www.windowsitpro.com/article/exchange-server/How-to-Uninstall-a-Stubborn-Exchange-Server.aspx

Without seeing the design, I cannot say 100% u need to do this.
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TechneutAuthor Commented:
Thanks, but "I think" this is more than I need. The domain is just an additional domain that we added by creating an additional OU, adding IP's in DNS and pointing the MX records to our exchange. The company is moving their services, so we no longer need to support their exchange.

At this point, if we email their domain, then the emails fail because DNS is pointing to our server (I just deleted their records in DNS). I need to remove their OU and their records to clean our Active directory. Do you think  I need to run DCPROMO to remove an additional domain?
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AmitIT ArchitectCommented:
I am bit confused with OU part. If you can paste some screeshot, will see them
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TechneutAuthor Commented:
Remove Domain
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AmitIT ArchitectCommented:
Thanks for the screenshot. Deleting OU is not required. It is just a folder to logical structuring of AD. If you have server resides in this OU. Just delete the server object first.  Later down the line, when you don't need OU remove it.
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TechneutAuthor Commented:
Well the problem I'm having is that I cannot email them. The domain is alive on a different server, but I'm trying to eradicate the issue of not being able to email them.
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AmitIT ArchitectCommented:
If it is not live remove it.
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TechneutAuthor Commented:
Thanks for your help Amitkulsh... I actually had to go into ASDIEdit to get rid of it entirely. I couldn't remove it without doing so.
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