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One domain, two sites, two exchange servers?

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  • One domain, two sites, two exchange servers?

    Hi! This is my first post. A friend suggested I post here in hopes of resolving this annoying Exchange puzzle...

    We have a single 2003 domain. Our company has two locations and up until recently had a single SBS. We use Exchange heavily and the remote office was connecting in over a VPN to access their mailboxes. We recently purchased a new server (NEWSERVER) and cleanly installed Server 2003 and Exchange 2003 on the old server (OLDSERVER). The goal is to put OLDSERVER at the remote location and have it hold their Exchange mailboxes so they can access their data locally.

    The problem, of course, is that it isn't working correctly.

    When an email is sent from the outside, it hits NEWSERVER (as I would expect it to) and sits in the "messages queued for deferred delivery" queue.

    When an email is sent internally, it creates a queue called OLDSERVER.domain.local and just sits there.

    I have a mailbox store on OLDSERVER and moved my test user's mailbox to its message store. The user's properties within AD Users and Computers show, on the Exchange General tab, that the mailbox is on OLDSERVER. My assumption is that something is missing that tells NEWSERVER to send messages to OLDSERVER when the mailbox does not exist locally on it. Shouldn't AD tell it to do this automatically, though? I mean, it clearly knows that the mailbox is on the other server so why doesn't it just route them using the global catalog?

    Any help is appreciated! Thanks!

  • #2
    Re: One domain, two sites, two exchange servers?

    Update:

    Based on another post I found on this board, I managed to get internal mail working. I created SMTP Connectors pointing between the two servers with a cost of 2 and removed the Smart Host from the SMTP connector on NEWSERVER. I also set "Forward mail with unresolved recipient" so the two servers point at eachother.

    Everyone can send and receive normally as long as their mailbox is on NEWSERVER. All incoming and outgoing work fine. On OLDSERVER, incoming works fine both when they come from the inside or the outside but we are unable to send mail anywhere.

    Any thoughts?

    Comment


    • #3
      Re: One domain, two sites, two exchange servers?

      SMTP Connectors should not be used for connecting two servers. They are for email leaving the Exchange org - IE outbound email.

      First thing to check is whether you have a smart host configured on the SMTP virtual server of the original machine. If you do, remove it.
      As the servers are on separate sites I would probably suggest that you split them in to their own Routing Groups, then create a routing group connector between them. Before you split them, change the SMTP virtual server IP address setting from the "All Unassigned" setting to the specific internal IP address of the server.
      Then create a new routing group and move the other server in to it. Create a Routing Group Connector.

      Next - ensure that the servers can resolve and communicate with each other. Inter-server traffic goes by SMTP, so a telnet to the other server will confirm if connectivity is good.

      telnet ip.add.re.ss 25
      telnet servername 25
      telnet host.domain.local 25

      All three should work.

      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


      • #4
        Re: One domain, two sites, two exchange servers?

        Thanks, I'll try these this afternoon and see how it goes. At the moment, and I probably should have put this in the intial post, both servers are at the same location while I test.

        Comment


        • #5
          Re: One domain, two sites, two exchange servers?

          The fact that they are in the same location doesn't really matter. You can still split them in to their own routing groups ready for when they do move. However that does mean that some potential causes for problems (firewalls for example) can be ruled out.

          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


          • #6
            Re: One domain, two sites, two exchange servers?

            Success!!!

            Using your suggestions and some others, it's working.

            Two routing groups with one server in each. Created a connector for the two groups. When there was a Routing Group Connector and SMTP connector on NEWSERVER, we were able to send internally fine between both servers and send externally from NEWSERVER but the user on OLDSERVER was unable to send externally. If I created an SMTP connector on OLDSERVER we were then unable to send internally but could send externally. What I finally had to do was create a new SMTP connector on OLDSERVER and set its cost to 2. I imagine that it polls NEWSERVER first, doesn't find the recipient, and then uses the SMTP connector to send out.

            Thanks for your help!!!!

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