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Exchange 2010 relocation advice

Posted on 2013-01-18
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Exchange 2010 relocation advice

I have been charged with moving a newly acquired company's Exchange server to my headquarters site.    
My company, Co-A, has a separate AD infrastructure (DC,DNS,etc), users, servers, etc. but I am not concerned with establishing trusts or integration of the two companies at this time (unless this will make this project easier).  My primary focus is moving Co-B’s email to my physical HQ site.  Co-B’s existing server is currently located in a datacenter with a hosting service provider.   Exchange is the only service that will be moving at this time.  This project is Win2008R2 AD and Exchange 2010.  

This project has a quick turnaround need so I am looking for the quickest and easiest way to move Co-B’s email to Co-A’s site.   Here is my initial plan:

-      Create new network segment for Co-B’s resources at Co-A’s location.  
-      Establish VPN to Co-B’s host site (where DC/GC and Exchange is located for Co-B) from Co-A.  
-      Build DC/GC on this new Co-A network segment and establish replication with DC/GC at Co-B’s host site.
-      Build new Exchange 2010 server (same revision/patch level as Co-B exch servers) at Co-A.  Purchase UC cert for exchange, establish new OWA site at Co-A.
-      Migrate mailboxes.
-      After all mailboxes have moved: add Co-B’s domains to Co-A’s email gateway and change Co-B’s MX records to point to Co-A’s email gateway.
-      Once mailflow is established and stable, move all primary roles for Exchange 2010 Org to new server at Co-A’s site.  Decommission Co-B’s original Exch 2010 server.

If you see any missteps, items missing, or items that will be problematic please advise.
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Question by:cypsupport
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Amit earned 1500 total points
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by:cypsupport
ID: 38794166
Okay thanks amitkulshrestha - this sounds interesting.  So if I were to use the cross forest migration route .... one hurdle I will have is that my existing Exchange Org is Exch 2007.  I do have a new server with Exch 2010 licenses though.  So if I brought this online in my existing Exchange Org, would I need to migrate my existing users to this server and decomission Exch 2007 before I start this project .... or could I leave my users on the Exch 2007 server and worry about this after the Co-B users are migrated.
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by:Amit
ID: 38794194
You can leave them on Exchange 2007 and do it later. Exchange 2007 and 2010 coexistence is supported. First you can do the migration for other domain users. In you case you have need to perform two migration

1) Cross Forest.
2) Intra-Org Migration or Transition in 2010.
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