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Exchange 2003 (SBS) to 2016 swing migration

Posted on 2016-09-06
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Last Modified: 2016-09-25
Dear Experts,

I'm in a tricky place here. I have an SBS 2003 that I am migrating off to a few new VMs all with windows 2012R2 and Exchange 2016.  I was hoping to do a swing from exchange 2003 to 2010 and then on to 2016 but I've hit a brick wall.

I have so far joined a new 2012 R2 server to the domain and promoted it to DC.  Forest level is raised 2003. AD is working and replicating.

I've now added another with 2012R2 and joined it as a member server.  I was planning on installing exchange 2010 so that I could move mail services to it.  During the install I got an error message about preparing the organisation for exchange 2010 and that no 2003 or 2007 exchange servers could be reinstalled after this.  I googled around only to discover that Exchange 2010 won't install in a 2012R2 domain!!


1. Is this accurate?  I can't install Exch 2010 on a server that has an 2012R2 DC? Or is it that I can't install it on a server with 2012R as the OS? Could I spin up a 2008 R2 server and use that?

2. If I cant do any of the above, what are my options?  

I don't want to do a greenfield on this if possible. Too many LOB apps that would not like a new domain.

Thanks
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Question by:tech53
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FOX earned 167 total points (awarded by participants)
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I can't install Exch 2010 on a server that has an 2012R2 DC?<<  You don't want to install Exchange on a domain controller.

Exchange 2010 can definitely be installed on Server 2012.
Exchange 2010 is supported in a 2012 Domain.

ref link: https://blogs.technet.microsoft.com/rmilne/2013/09/17/exchange-support-for-windows-server-2012-r2/
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by:tech53
ID: 41786535
Thanks. I didn't mean install exchange on a DC but rather that it was installed on a member server in a domain that has a 2012R2 DC as the top level schema.

Not to split hairs but I'm talking about 2012 R2 not 2012.

http://exchangeserverpro.com/exchange-server-2010-support-windows-server-2012-r2/

So does this mean I can install each 2010 on a Windows 2008R2 server that's in a 2012R2 domain?
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by:FOX
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Definitely
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by:ScottCha
ScottCha earned 166 total points (awarded by participants)
ID: 41786661
What that message means is that once you install Exchange 2010 you can only install more Exchange 2010 machines...no additional 2003 or 2007 can be added...and there is no reason to.

Once you have migrated to Exchange 2010 you will have to completely uninstall Exchange 2003.  Just shutting down the machine isn't enough.

If Exchange 2016 detects any 2003/2007 AD entries, the setup will halt.
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by:Todd Nelson
Todd Nelson earned 167 total points (awarded by participants)
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Take care not to raise the forest and domain functional levels to Windows 2012 or R2 prior to removing Exchange 2003 from the environment.

This is the Exchange supportability matrix.  It should answer most of your questions regarding what type of server and environment each version of Exchange can be installed in. ... https://technet.microsoft.com/library/ff728623(v=exchg.150).aspx

Exchange 2010 is not supported on a server with the Windows 2012 R2 OS.  I would recommend that it be installed in Windows 2008 R2.
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by:tech53
ID: 41786820
Nice one guys. Thanks for clearing that up. I'll do the install in a 2008 r2 box. Once migration is complete, I'll remove exchange from the SBS and demote it. Then I'll uodate the domain functional level to 2012. Will let you know the outcome.
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by:tech53
ID: 41807773
Folks,

I'm happy with the solution presented. Following the recommendations, I have installed Exchange 2010 on to 2008 R2 and it worked fine.

Thanks to all.
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by:Todd Nelson
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You should have enough information for the requested solution.
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