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Install Exchange 2010 in an Existing Exchange 2007 Organization

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  • Install Exchange 2010 in an Existing Exchange 2007 Organization

    Hi,

    I'm planning to update Exchange 2007 to Exchange 2010 and I have few questions.

    1. When installing Exchange 2010 will it somehow modify the current Exchange 2007 installation so that it is visible to users? I mean can I install Exchange 2010 and all latest updates, make new certificate request etc. in business hours and make the transition later?

    2. When everything is ready (new certificate in place, updates etc.) in 2010 installation I can just move the mailboxes from 2007 version and modify the firewall to direct all needed traffic to 2010 version.

  • #2
    Re: Install Exchange 2010 in an Existing Exchange 2007 Organization

    You can install 2010 on a new server as part of an existing Exchange organisation -- no mailboxes will be harmed during the process.

    As you say, once installed and tested, you can set up the CAS role properly, add certs for OWA/Outlook Anywhere and move mailboxes to the new server. Incoming email will be passed from the 2007 HT to 2010 so no need to move SMTP until later.
    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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    • #3
      Re: Install Exchange 2010 in an Existing Exchange 2007 Organisation

      Sorry to disagree with the above, but if you install Exchange 2010 with the CAS role then Outlook 2007 and above clients will start using it within about 20 minutes for autodiscover functionality.

      This is because the Exchange 2010 server will start to publish its autodiscover information to the domain and you will get in effect an autodiscover "war" between the two servers.

      You need to either change the value of the AutodiscoverServiceInternalURI on set-clientaccessserver of the new server immediately after installation or get a commercial SSL certificate installed as quickly as possible to ensure that you don't get SSL prompts etc from the clients.

      The prompts could start very shortly after installation.

      Do ensure that you create an RPC CAS array before moving any mailboxes as well, even if you have no intention of using any kind of load balancing functionality. In three or four years time when you come to upgrade to the next version you will thank me for it.

      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.

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      • #4
        Re: Install Exchange 2010 in an Existing Exchange 2007 Organization

        Thanks for the answers.

        What is the best way to do this transition without disturbing existing Exchange 2007 installation and users?

        I need some time to make certificate request on Exchange 2010 installation and getting a new certificate can take as much as few days.

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        • #5
          Re: Install Exchange 2010 in an Existing Exchange 2007 Organization

          Best would be to decide which names do you want to use and request the certificate before installing Exchange 2010. So you are able to provide the certtificate as soon as you installed the CAS role.

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          • #6
            Re: Install Exchange 2010 in an Existing Exchange 2007 Organization

            The way that I do it if there is a concern is to install the first server out of hours, then change the autodiscover value. That stops the SSL prompts.

            So change AutodiscoverInternalServiceURI on set-clientaccessserver to the existing Exchange server. The clients should use the old server. Then you can request the new certificate. Once done change the value back to the default.

            If the site is quite small you can often get away with simply doing the installation during the day, and then taking the SSL prompt hit.
            It very much depends on how tolerant your users are.

            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.

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