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Upgrading Exchange 2003 to Exchange 2010 in a multiple exchange 2003 Environment

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  • Upgrading Exchange 2003 to Exchange 2010 in a multiple exchange 2003 Environment

    Hey all,

    i am looking in an exchange 2003 to an exchange 2010 upgarde scenario that i haven't done before and i am looking for some sort of information/advice.

    I have one domain / one forest with 6 exchange 2003 servers, one at the central location and another 5 at remote locations.
    The one at the central location acts as a primary and circulates incoming emails to the other 5.

    The Exchange 2003 at the central location is to be upgraded to Exchange 2010 and then decomissioned whereas the other 5 Exchange 2003 will remain indefinetely . My problem lies with the routing group connection created at the installation of the Exchange 2010 and the need to delete it before decommisioning the exchange 2003.

    What will happen to the flow of information since there won't be any routing between the Exchange 2010 and the Exchange 2003 routing group.

    My ideas start off at selecting a different exchange 2003 as routing group connecting server but i don't know how that will affect my mail flow during the migration and before decommisioning the main exchange 2003 and how will it affect the oab and public folder services migration.

    Any thoughts are most welcome

  • #2
    Re: Upgrading Exchange 2003 to Exchange 2010 in a multiple exchange 2003 Environment

    You don't have to keep the RGC that the installation creates. Just create an additional connector before you remove the server that it is currently using.

    However my personal preference would be to retain the Exchange 2003 server in the local site, have the RGC connector between Exchange 2010 and that server, so that the Exchange 2003 server controls the distribution of the email. The RGC between the two versions should be considered the bridge between them, over which all email between the two versions will flow. It can get complicated very quickly. Whereas retaining the Exchange 2003 server locally makes life a lot easier.

    Simon.
    --
    Simon Butler
    Exchange MVP

    Blog: http://blog.sembee.co.uk/
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