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How to remove a Secondary DC?

Posted on 2007-11-17
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Last Modified: 2008-02-20
I have a secondary DC with exchange installed on it. How should I remove it from the Domain?

The story behind:  - this issues here has already been resolved but gives the details

"....Thank for that but it seems a little more complicated.
After posting my question I have turned on the Old Exchange Server and now all accounts seems like they should be.

As it appears the old exchange server has something to do with this.

The reson for the new server is that I made a mistake and made my Exchange server a secondary DC. From this moment on for the last 3 month I had to restart the server twice a day. After restart it worked fine for half a day, and after 8-12 hours of peration it stopped authenticating...

I investigated the issue and found that I was not supposed to make the Exchange server a secondary DC and there is no fix...so it was just matter of time to create a new one.

This weekend I took the time and built a new one, "XChange" .
XChange is part of the domain but not a DC. I have moved the mailboxes and the public folder store to the new server and all seems fine, except this user creation......."

Now the user creation problem is solved but I also want the old server to be removed...


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Question by:tom_szabo
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tigermatt earned 2000 total points
ID: 20307145
As you've already found out, any change to the DC role of a server running Exchange will BREAK Exchange. Provided you have moved all of the Exchange roles to your new Exchange server, you can uninstall Exchange from this secondary DC. Once you are happy Exchange has gone successfully (and I suggest you restart a few times as it can take a few restarts to clear everything out), then you need to check that this DC doesn't hold any FSMO roles, isn't the only global catalog, isn't the only DNS server and any other roles you can find which may need to be moved back to your first DC. If you're happy that there isn't anything, then you can safely dcpromo the machine out of the domain, then format and re-install as necessary.

As always, when performing major work like this, I would strongly advise you to have a backup of all your servers and to run the changes over a weekend or a time when your network is quiet. Don't do it during office hours in case something goes drastically wrong!!!

-tigermatt
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