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Wrong OS Version for DAG

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  • Wrong OS Version for DAG

    Hi,

    We recently implemented

    1server CAS, Mailbox and Hub role (Windows 2008R2 / Exchange 2010 Ent Edition )
    1server Edge (Windows 2008R2 / Exchange 2010 Std Edition )

    We have migrated all users and have been running successfully.

    1 BIG PROBLEM we realised. In order to configure DAG in exchange, it also requires the operating system to be in Enterprise Edition.

    Now the next big question is, how are we to to workaround this current environment in order to configure DAG ?

    Appreciate your inputs. Many thanks!

  • #2
    Re: Wrong OS Version for DAG

    Build new servers. That is your only option. Changing the version of Windows with Exchange installed is not supported.

    As you will need a second server for the DAG, build that server, move all mailboxes and data to that new server, the remove the original and rebuild it.

    Hopefully you have configured an RPC CAS Array, otherwise life is going to be more difficult for you.

    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: Wrong OS Version for DAG

      Hi Simon,

      Thanks for your reply. Acknowledge that building up a new server is the only option. My concern is to resolve this issue without downtime of email.

      Example, build up a new server with ent editions for OS and xchange and moving the database to the new environment. Will there be any reconfiguration required by the users as the exchange server name will be new.

      Is there a workaround or a step to take to ensure there's no downtime?

      Thanks.

      Comment


      • #4
        Re: Wrong OS Version for DAG

        If you do not move your CAS server, no downtime of email when you move mailboxes
        If you have a CAS array (as Sembee recommends), also no downtime of email even when the CAS server is changed

        Consider leaving your current Exchange server as CAS / HT only?
        Tom Jones
        MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
        PhD, MSc, FIAP, MIITT
        IT Trainer / Consultant
        Ossian Ltd
        Scotland

        ** Remember to give credit where credit is due and leave reputation points where appropriate **

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        • #5
          Re: Wrong OS Version for DAG

          There is no reason why all implementations of Exchange 2010 should not have an RPC CAS Array. Due to the architecture change in Exchange 2010 not implementing one will cause a lot of work when it comes to migration or adding a new server in to the environment later.

          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: Wrong OS Version for DAG

            Thanks for your reply. I would appreciate if you can advice how can i work around within the limited capacity (4 servers) that i'm currently have.

            I know installatation of windows 2008 enterprise edition is inevitable , but i'm thinking of a way to get this sorted while not having any downtime.

            Days are getting close for me to have this DAG up as i need to implement on other sites.

            Comment


            • #7
              Re: Wrong OS Version for DAG

              Four servers?
              Not a problem. I rebuilt an entire environment with four servers in an afternoon for a client, they didn't even notice and were a little surprised when I told them the job was done.

              Build the new mailbox database, move the mailboxes, remove the old server, rebuild it, add to the DAG.

              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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