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Two Exchange servers with the same e-mail domain in two different AD's

    คำถาม

  • Greetings,

    We have a Exchange 2007 server that we're migration from, and an Exchange 2013 server that we're going to.

    Both are in separate AD domains.

    So, if you sent an e-mail to someone in company.com it goes through Google spam first, then on to the Exchange 2007 server.

    We need the Exchange 2007 server to auto forward any user that doesn't exist on that server, to the Exchange 2013 server, so that once we migrate (move) someone to the newer system, they will still get their mail.

    In contrast, we need the same thing to happen with the Exchange 2013 server so that users on that server can still send e-mail back to users on the Exchange 2007 server.

    Doing this per mailbox is waayyy too cumbersome for making rules per recipient.

    We want the Exchange system to simply send/relay mail for recipients it doesn't possess onto the other Exchange server.

    What we don't want, is a loop of endless relaying, where server a sends to server b cause it doesn't have that person, and server b sends it back to server a for the same reason.

    Any thoughts would be appreciated.


    Alert from Microsoft Forum

    2 กรกฎาคม 2561 4:51

ตอบทั้งหมด

  • So we changed the Accepted domain configuration of the domain in question, to Internal Relay for both servers.

    I then made a Send Connector on 2007 to send e-mail to 2013 when it doesn't have the recipient.

    That works.  Both servers can e-mail one another with recipients in the same domain name.

    What doesn't work is that 2007 doesn't appear to forward to 2013 any external e-mail.

    So if we send e-mail from a Hotmail account, to a user that ONLY exists on the 2013 side, they never get it.

    If someone on the 2007 side sends an e-mail, then they get it.

    How do we make the 2007 server forward e-mails it gets from the outside onto the 2013 server?


    Alert from Microsoft Forum

    2 กรกฎาคม 2561 18:47
  • Hi

     

    In you case, the Exchange 2007 organization and Exchange 2013 organization are in separate AD domains and users in each email system have the same domain suffix as part of their email addresses, right? Based on my experience, the internal relay domain should be applicable to your scenario. The accepted domain that's configured as an internal relay domain first tries to deliver to a recipient in the Exchange organization. If the recipient isn't found, the message is routed to the Send connector that has the closest address space match.

     

    In your test, if you send e-mail from a Hotmail account, to a user that ONLY exists on the 2013 side, the email will not deliver successfully, is there any non-delivery report (NDR) returned to the sender? Please provide us the detailed NDR message for analysis. Meanwhile, please use the Get-MessageTrackingLog cmdlet on Exchange 2007 and 2013 server to check if you can find any items about this “missing” message:

     

    Search message tracking logs

    https://docs.microsoft.com/en-us/exchange/mail-flow/transport-logs/search-message-tracking-logs

     

    I am looking forward to your reply.

    Regards,

    Gavin Gao


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    3 กรกฎาคม 2561 5:15
  • We made a new receive connector to allow relaying.

    That appears to be working but we can't perform a full test until after the 4th of July (company is closed).


    Alert from Microsoft Forum

    4 กรกฎาคม 2561 4:21
  • Hi DarkAngel11,

     

    Thanks for your sharing, if there is any update, feel free to let me know.

    Regards,

    Gavin Gao


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

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    4 กรกฎาคม 2561 4:53
  • Hi,

    Any update now?

    If there is any update for this issue, please feel free to let me know.

    Regards,

    Gavin Gao


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

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    • เสนอเป็นคำตอบโดย Gavin-Gao 10 กรกฎาคม 2561 7:24
    6 กรกฎาคม 2561 6:19