Domain Controller is 32 Bit Windows 2003 trying to add 64 bit Exchange with 64 bit win 2003

64 Bit Exchange
Exchange Server
I am having difficulty adding a new 64 bit exchange server to a 32 bit AD Domain Server. Is there a patch for this?

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Updated on 11/20/2007 by Wrobinson:

You need a 64-bit machine to run the Active Directory and Domain Preparation commands from. One option is running these commands using a 32-bit version of Exchange and while this version is not supported in a production environment, in theory the schema changes should be identical. To remain in good graces with support, I would obtain a statement of support for doing so prior to executing it. Otherwise, you can introduce a 64-bit domain controller into the same site as the schema master and run the commands from there. The 64-bit DC can then be removed from the site demoting it, removing it from the domain, taking it offline and removing any DNS records for it; if there is any residue leftover, it can be removed using Ntdsutil.

*** Finish Update ***

What error messages do you receive? Is your DC a 2003 R2? Is your Exchange running on 2003 R2? Do you have your Active Directory Schema correct?
We really need more details of what messges you are seeing as I have installed several Exchange 2007 (64-bit) in enviroments that run 32-bit 2003, one even had a 2000 SBS server that we eventually decommissioned. So, more details on what you are doing is required to give a better answer.


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  • Rolling15
    DC is running 2003 sp2 (32 bit) and Exchange(64 Bit)is running 2003 R2. Can't seem to find the adprep for the system.
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  • ENWarner
    I am trying to introduce a 64 bit domain controller to my currently running schema which runs on a 32 bit domain controller, I run Windows Server 2008 on my current and 2008 R2 on new. I plan to demote my 32 bit server once I can get the 64 bit server into the domain. Everytime I try to do a dcpromo to add the domain controller it says the I must run adprep /forestprep on my domain controller. I try that and it trys to run but says that it did not need to run that it was up-to-date. Any ideas how to add this R2 server to my domain? Thanks ENW
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  • MelanieYarbrough
    Hi ENWarner, Try posting this as a new question to increase your chance of a helpful answer. Thanks, Melanie
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