Server 2003(DC) with Exchange 2003 upgrade to Server 2008

Posted on 2012-09-17
Last Modified: 2012-09-26
I have a DC running Server 2003 with Exchange 2003...I need to update to Server 2008 but want to leave Exchange 2003 temporarily...I already have a 2010 exchange server in the mix but don't want to move all of the mailboxes right now(I have moved a majority already) this possible????
    LVL 6

    Expert Comment

    Yes, it is possible. You can just have a routing group connector to have mail flow between 2010 and 2003 until you are ready to retire Exchange '03.

    Author Comment

    by:Masonic Homes Kentucky I can do the OS upgrade from 2003 to 2008...I've already got the connector setup and mail flows between the 2003 and 2010 without main concern was the  OS upgrade from 2003 to 2008 upgrade.
    LVL 6

    Expert Comment

    Sorry, I misunderstood your question. I'm not sure that you can do this and would have to do a little research. Personally, I would not even research it because I do not like OS upgrades. I especially do not like them on an Exchange server. Why do you have to upgrade the OS? Isn't your goal to get rid of '03 in the near future?
    LVL 6

    Accepted Solution

    Firstly while installing Exchange Server 2003 on a domain controller is a supported operation, it is not a best practice or a generally recommended practice. As well, once Exchange Server 2003 is installed, it is not supported to change the domain controller status of the server. That is, if the server is already a domain controller, that's fine. Do not change the server to a member server. The opposite is also true - if you install Exchange Server 2003 on a member server, do not then dcpromo the server up to a domain controller. Refer below article

    Secondly Exchange 2003 server would not run onWindows server 2008 as it isin the list of the incompatible applications on Windows Server 2008.
    You could refer to the following article for more information:
    Description of the Microsoft server applications that are supported on Windows Server 2008

    Reading your initial post it is understood that you still have few active accounts in Excange 2003 and if you do not want them to be without emails then do not go ahead with your OS upgrade from 2003 to 2008. best option is to migrate\move them over to exchange 2010 and then move with whatever you want to.


    Author Closing Comment

    by:Masonic Homes Kentucky
    Thank You!

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