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Demotion of 2003 domain controller

oldskool75
oldskool75 asked
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Last Modified: 2010-04-18
Hey experts,  
I have a Domain controllerthat the guy before me installed with exchange on it.  I wanted to install another server to act as the DC so that our email and DC are on seperate systems.  Is there any issues I need to look out for and is it weven possible to demote with exchange on this server?  I already promoted the new server to a DC and it replicated AD already and I transfered my DHCP scope to the new box too, but eventually I want the new box to be the primary DC and the old one to be just a DC.  What are my options?
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Commented:
Do NOT demote a DC running Exchange, this will break Exchange.
Overview of operating system and Active Directory requirements for Exchange Server 2003
http://support.microsoft.com/?kbid=822179

Exchange Server 2003 and Domain Controllers - A Summary
http://blogs.brnets.com/michael/archive/2005/01/24/319.aspx

Assuming (considering your question title) that you actually want the old one to be "just an Exchange server" (and not "the old one to be just a DC" as you've actually written), there's not much you can do except a full backup of your Exchange, uninstall Exchange, demote the machine, reinstall Exchange, restore Exchange.
If you want the old one indeed to "be just a DC", then just uninstall Exchange ...

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Commented:
hey there thanks for the response and sorry for my late reply, I have been out of town.  I want the"old server", which is the current PDC, to just have exchange on it.  I installed a new server which I want to handle the responsibility of PDC and still have the old server as a DC for replication of AD.  If I uninstall exchange and reinstall it how do I keep the same information store DB?
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Most Valuable Expert 2019
Most Valuable Expert 2018

Commented:
Sorry, that I can't answer reliably; you might want to ask a question (or a pointer to this one) in the Exchange TA (http://www.experts-exchange.com/Networking/Email_Groupware/Exchange_Server/).

Commented:
It sounds like what you're looking to do is add an additonal domain controller, then have it Host the global catalog.. you can then seize the various roles of Active Directory using NTDSUTIL.

See:

http://support.microsoft.com/kb/295419/en-us
http://support.microsoft.com/kb/255504/en-us
http://support.microsoft.com/kb/234790/en-us

What i'm not sure on is what roles you want to seize so you don't mess up exchange.

Hope that helps.


Commented:
To add on to my last post..

After reviewing the 2nd link.. it seems that the proper course of action is to make your new DC host the global catalog..
Then give it time to propigate the GC to your new DC.

After the global catalog has propigated you can transfer/seize all 5 AD roles using NTDSUTIL

Author

Commented:
Wow I don't remember reading this in any microsoft books.... crazy....  so the most important thing that I am worryed about is exchange.....  I want to make sure that in the end the worst case scenerio is I have reinstall and remount the information store....  will moving the FSMO roles make this less painless.  
Commented:
Make sure you do a transfer instead of a seize since your old DC will still be online.
I don't think that making your new DC a global catalog server then transferring the FSMO roles will effect exchange at all.



Commented:
To add on to my last post.. you'll want to leave exchange on your existing exchange server.
This scenario is much easier to do since you want to leave your exchange server as a backup DC.

Let me know how it goes.
i'm going to need to do the same thing in a few weeks transitioning from Small Business Server 2003 to two servers, moving the PDC role to a new Windows 2003 server while leaving my old DC as a backup domain controller/exchange server.

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