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Replacing Exchange server 2003(originally SBS but has transition pack) with exchange 2010 on Server 2008

Posted on 2011-03-18
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I am configuring a new server running 2008 R2 to replace our existing Server 2003 machine which started its life as a Small Business Server and had the transition pack applied several years ago. The new machine will be one of 2 DC's. The current machine runs Exchange, Sharepoint, and RRAS (which I understand has been replaced with NPS) The new server will run Server 2008 R2 with Exchange 2010 and Sharepoint 2007. Once the new server is configured, the old one will be taken out of service. I have already made the new machine a DC and transferred the FSMO roles to it. I need to know what the next step is to get Exchange up and running and move the mailboxes over with minimal downtime. We currently have both Outlook 2010 and 2003 clients connecting, as well as a number of mobile users(laptops) and smart-phones connecting to Exchange. I want to make sure I do this right as there are only two of us supporting this network for about 80 users. I have found info that relates to SBS, but not much relating to SBS that has been transitioned.  (We also use a Barracuda SPAM filter which may add some speed bumps)
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Question by:tallgeye
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by:vervenetworks
ID: 35166550
Get the new server installed.  Create a routing group b/w the two exchange servers, and move the mailboxes.  You can use the SBS 2003 to SBS 2008 migration guide for help with the exchange.  They use the same process at what you are looking for.  The internal clients will transition without downtime.  The laptops may need a little more of a touch depending on certificate stuff for outlook anywhere.
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by:tallgeye
ID: 35180253
Thanks vervenetworks,
So I can go ahead and install exchange on the new server and my current installation will not be affected. I was concerned that email would stop working when I install 2010 on the new server. This is my first upgrade of this type.
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by:vervenetworks
ID: 35182604
As long as the pre-reqs are completed properly (AD/Forest schema updates, Exchange Native Mode) you can install, and then setup a routing group to ensure mailflow is not affected.  Then do a move-mailbox through EMC or Powershell.  Pay special attention to Public Folders, as they changed quite a bit from 2003.
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tallgeye earned 0 total points
ID: 35743360
We are mostly through this process, but right now we can send mail from a 2010 user to another 2010 user and from 2003 user to 2010 user, but not from 2010 user to 2003 or to outside our domain. I'm sure this has somehting to do with routing groups, but its got us stumped so far. This has been a long process since we are just a two man team with roughly 18 locations and over a hundred PC's to manage so we get interrupted frequently. Would love to get the exchange part of the process done this week.
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Author Closing Comment

by:tallgeye
ID: 35872664
This solution is not complete. We are in the home stretch and are not receiving any more replies on this thread so I am going to post the final issue as a new question
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