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  • external exchange on VPN connection to AD problems

    Hi

    Great site, has helped me loads whilst administering Windows boxes.

    I have a slight issue with my exchange server and connectivity to the AD server. We have an external exchange server that is connected via a vpn to our office. This all works fine until the router in the office locks up and does not self reboot. Domain Users cannot send emails because their accounts cannot be authenticated. Is there a way of configuring the exchange server to do this authentication? or is the connection to the DC definately needed?

    Thanks in advance

    Shaun

  • #2
    Re: external exchange on VPN connection to AD problems

    Exchange needs a domain controller. Do you not have a domain controller with the Exchange server? If so I would look at correcting that quite urgently. I would never run Exchange with a domain controller only available over a remote connection. Exchange queries the DC a lot, and going over a VPN will show significant performance hit on the server.

    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: external exchange on VPN connection to AD problems

      Hi

      Thanks for the reply. To be honest we are seeing no performance issues connecting it the way we do, the only issue is stability. Would i have to promote the exchange server to be a domian controller to achieve what i want then? Or is there some way of making it a back up DC where it only takes over in the case of the connection to the main DC is lost?

      Comment


      • #4
        Re: external exchange on VPN connection to AD problems

        Promoting the server to a domain controller is NOT something that you should do. Changing the role of the server once Exchange is installed is not supported and will usually break Exchange.

        Domain controllers are equal - you don't have a "main" domain controller, although one domain controller would hold one or more roles.
        Therefore if you were to place a domain controller with the Exchange server then Exchange would use it because it was the closest DC.

        While you may not be seeing any performance issues, that doesn't mean it is the right way to work or that it will continue to work that way. The fact that you have problems when the VPN fails is an indication of a problem that you should resolve.

        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


        • #5
          Re: external exchange on VPN connection to AD problems

          Thanks for the advice. But in the current set-up what you suggest is not possible at this point in time.

          I will keep investigating alternative solutions.

          Comment


          • #6
            Re: external exchange on VPN connection to AD problems

            There are no alternatives.
            If the VPN connection fails your Exchange server is dead in the water. It needs constant connection to a domain controller.

            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

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