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2 Sites, 2 MX records, 1 Exchange org?

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  • 2 Sites, 2 MX records, 1 Exchange org?

    We are in the early design stages of an Exch2003 to Exch2010 upgrade. A question was asked about the design.

    Each site has its own internet connection as well as a T1 WAN link between them

    Currently, Site A is recieving email for both domains into a single Exch2003 frontend/backend server. Site B users connect over the WAN.

    The proposed question/scenario:

    Site A:
    MX record for domainA.com
    Edge Transport server
    HUB/CAS/MBX server
    150 users
    primary email address = [email protected]
    secondary email address = [email protected]

    Site B:
    MX record for domainB.com
    Edge transport server
    HUB/CAS/MBX server
    150 users
    primary email address = [email protected]
    secondary email address = [email protected]

    Is it possible to tweak the send and recieve connectors between the HUB and Edge servers on each side so that I can recieve email for each namespace at a different location yet still keep it as a single Exchange org on the inside?

    Site B was an aquisition and while there is some crossover between the sites, for the most part they recieve email addressed only to their own namespace. The purpose of this scenario is to get the external email traffic from site B off the WAN and onto their internet connection.

    I'm not even thinking about fault tolerance or DR at this point. Just trying to determine if this is a route that I can go.

    Thanks,

    John

  • #2
    Re: 2 Sites, 2 MX records, 1 Exchange org?

    When it comes to accepted domains, Exchange doesn't care where the email enters. Accepted Domains is a Forest Wide setting and any Exchange server can accept email for it. Therefore you can have both servers in the MX records for every domain if you wish.

    For sending email, put both servers in a separate AD site and the email should leave on the server it was closest to. Again it doesn't really matter.

    Single SSL certificate with probably 10 slots, which will allow both servers to support autodiscover, TLS, and OWA access for either domain.

    Simon.
    --
    Simon Butler
    Exchange MVP

    Blog: http://blog.sembee.co.uk/
    More Exchange Content: http://exchange.sembee.info/
    Exchange Resources List: http://exbpa.com/
    In the UK? Hire me: http://www.sembee.co.uk/

    Sembee is a registered trademark, used here with permission.

    Comment


    • #3
      Re: 2 Sites, 2 MX records, 1 Exchange org?

      I hadnt even thought about separate OWA. That all makes perfect sense. thanks for your time.

      off to the lab

      John

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