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  • 1 domain, 2 active Exchange 2010

    Hi all, i'm a newbie in exch 2010 world, i want to ask, is it possible to have 2 active exchange 2010 (synch-ing each other) in one domain?
    if possible, how to do it?

    thanks in advance

  • #2
    Re: 1 domain, 2 active Exchange 2010

    Yes, you can have two exchange servers, within one "exchnage organisation" that replicate between each other.

    You cannot have two separate Exchange organisations though.


    what are you trying to acheive.. ?
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    • #3
      Re: 1 domain, 2 active Exchange 2010

      My office is building a disaster recovery site, and currently they already have 2 exchange server 2010, one in the headquarter(HQ) as the primary exchange server, the other one is in the Disaster Recovery Site (DRS), for now the Exchange Server in the disaster is only used as a backup exchange server using DAG.

      Now, they have a plan to create 2 network (1 in HQ, 1 in the DRS), but under 1 domain.
      My question is it possible to make the two network(HQ and DRS) send emails using their own exchange server and to make both exchange to synch-ing each other (like a twin exchange), if possible, how (since i'm a newbie in exchange, i really don't have any clue about it).

      thx in advance

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      • #4
        Re: 1 domain, 2 active Exchange 2010

        You will need to use DAGs -- lots of information online:
        http://www.google.co.uk/#sclient=psy...gc.r_pw.&cad=b
        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: 1 domain, 2 active Exchange 2010

          thk you, i'll look into it

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          • #6
            Re: 1 domain, 2 active Exchange 2010

            hi Ossian, do you have any link that provide step by step guide on achieving the goal i mentioned? sorry, but i'm really blind about exchange 2010 , i already look into some of the article from your link, but i cant find a step by step guide.

            thx a lot

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            • #7
              Re: 1 domain, 2 active Exchange 2010

              i think you'd find it hard to get a step-by-step guide that's useful for your needs.
              start by just reading more about DAGs...

              if you've already got one set up.. it'd just be a matter of setting up another..
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              • #8
                Re: 1 domain, 2 active Exchange 2010

                Concur with tehcamel, but you could try this series of articles to give you more focussed information: http://mscerts.programming4.us/appli...part%201).aspx

                Have you considered some training -- www.trainsignal.com do a very good set
                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 **

                Comment


                • #9
                  Re: 1 domain, 2 active Exchange 2010

                  hi all, thanks for your kind advise, i think i will get my self some training later, i actually already started reading about DAG. I started to "touch" exchange 2010 because recently i just start to work in a new office, and my office currently setting up a business continuity plan site. They already setup 2 exchange 2010 servers, and already try the DAG, but for now, still facing error when trying to replicate the database. The error message is like this :

                  Summary: 1 item(s). 0 succeeded, 1 failed.
                  Elapsed time: 00:00:12


                  MDB05
                  Failed

                  Error:
                  A source-side operation failed. Error An error occurred while performing the seed operation. Error: Failed to open a log truncation context to source server 'abc.def.com'. Hresult: 0xfffffae7. Error: The database was either not found or was not replicated.. [Database: MDB05, Server: abc.def.com]

                  Failed to open a log truncation context to source server 'abc.def.com'. Hresult: 0xfffffae7. Error: The database was either not found or was not replicated.
                  Click here for help...
                  -url to microsoft help-
                  Exchange Management Shell command attempted:
                  Add-MailboxDatabaseCopy -Identity 'MDB05' -MailboxServer 'server2' -ActivationPreference '2'

                  Elapsed Time: 00:00:13

                  Do you guys ever met this error message? help pls?


                  The scenario that i told you guys is actually the 2nd option from my boss (the 1st option is to just have 1 active exchange server). He wants to have 2 separate network in 2 separate site, with 2 exchange server for each site, both exchange server handle email from each site, and both actively synch-ing each other using DAG.
                  As i know from you guys, and from some articles i read (including those articles from your links), in concept its possible to do this using DAG.

                  Is there any requirements or check list before doing this things?

                  really sorry to bother you guys

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                  • #10
                    Re: 1 domain, 2 active Exchange 2010

                    Personally I would say get a consultant in to help with the design and configuration. The setup of Exchange 2010 correctly is quite specialised, and you will spend time learning how to do it, only to throw that knowledge away as it isn't needed for the day to day operation. Rather than wasting the time, I would get a consultant in, who can go through the design, pick holes and generally tighten it up.

                    The request that your manager has made is very common, but you will not find many people recommending that you do things that way. While both sites are operating, everything is fine, it does work. You have the email replicating, and people are accessing the email as required.
                    However it is when there is a problem that you start to get issues. If the link between the two offices fails, then you get what is known as "split brain" scenario. basically this means that both servers could try to become active, and modify the data. Then when they come online, there is no way for the data to be merged back in.

                    When it comes to multiple sites, the best way is to use four servers, with two DAGs. An Active server on each site and its passive pair on the other site. That way you can configure things correctly so in the event of a link failure, the correct server stays online. If there is a loss of the site, then the passive server is forced online.

                    DAG is a data protection tool, and to work correctly you need it to work in a predictable manner, so that you protect all of the data. Active/Active on two physically separate sites connected by a WAN does not fulfil that criteria.

                    If you do decide to use a DAG, you also need to look at CAS arrays. The DAG is only the Exchange database data. In the event of a fail-over to another servers the clients DO NOT update to the new location, because they don't connect to the database directly.

                    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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                    • #11
                      Re: 1 domain, 2 active Exchange 2010

                      I'd never thought of this solution simon! nice one,t hanks !

                      (4 servers, 2 DAGs, one passive in each site..)
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                      • #12
                        Re: 1 domain, 2 active Exchange 2010

                        hi all, thank you so much for the reply, really appreciate it

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