Exchange 2007 migration to 2013

Hi,

Looking to upgrade from Exchange 2007 to Exchange 2013 within an infrastructure. Current system has a single Exchange 2007 box and an ISA box which also has mail marshal on it with twin nics one outside and one inside. Need to upgrade to Exchange 2013 as 2007 support now dropped with Outlook 2016.

Can we build a new machine and install Exchange 2013 on it and join this to the existing infrastructure with both versions of Exchange co-existing? Will the AD prep done by Exchange 2013 be ok on an AD that has already got Exchange 2007 prep on it? The Domain controllers are separate boxes so the Exchange 2007 box only has Exchange on it.

Are there any issues with trying to run two versions and migrate mailboxes from one to the other over time? Is there any helpful configuration options within Exchange to setup a secondary server to the 2007 master and how do you swap the secondary to a master after the migration is done?

Looking for some general advice and any helpful pointers in undertaking this type of migration.

Thank you
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Mr KnackeredAsked:
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Ganesh Kumar ASr Infrastructure SpecialistCommented:
The migration is big process, Let me brief you what you should do exactly.

Checklist to upgrade from Exchange 2007 :
https://technet.microsoft.com/en-us/library/ff805032(v=exchg.150).aspx


Ensure your existing Exch2007SP3 updated and your AD too.
Install Windows 2012 and introduce as member server for Exchange 2013 deployment.
Exchange 2013 Preparation
Exchange 2013 Deployment
Digital Certificates Configurations ensure you have new fqdn for exchange 2013 (old may point to : legacy.domain.com and new one may point to  webmail.domain.com)
Configure Exchange-related virtual directories
Configure offline address book (OAB)
Move Internet mail flow from Exchange 2007 to Exchange 2013
Move Client Access from Exchange 2007 to Exchange 2013
Virtual directory in exchange 2007 redirection
Update DNS configurations
Move mailboxes from Exchange 2007 to Exchange 2013
Move public folder data from Exchange 2007 to Exchange 2013
Decommissioning Exchange 2007

This is step by step guide to configure co-existence and migrate from Exchange 2007 to 2013:
https://araihan.wordpress.com/2014/01/23/configure-co-existence-and-migrate-exchange-20072010-to-exchange-2013-step-by-step-guide/

[http://blogs.technet.com/b/meamcs/archive/2013/07/25/part-1-step-by-step-exchange-2007-to-2013-migration.aspx

http://www.msexchange.org/articles-tutorials/exchange-server-2013/migration-deployment/planning-and-migrating-small-organization-exchange-2007-2013-part1.html

Configuring Outbound Mail Flow in Exchange Server 2013:  http://exchangeserverpro.com/configuring-outbound-mail-flow-in-exchange-server-2013/

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