Steps to Migrate Exchange 2013 from Server 2008 R2 to Server 2012 R2

I have searched the internet, but mostly found stuff on Exchange 2010 or from 2003 to 2013, etc.  I want to make sure we run through this correctly.

We are also migrating all of our environment servers from 2008 R2 to 2012 R2.  Is there a specific order you would do this?  Domain Controller first and then other servers after?  I'm seeing people also recommend staying away from "in-place" upgrades and instead building brand new servers.  Is this the consensus across the board even for something as simple as a file server?

Thanks,

Dan
Dan PaceIT DirectorAsked:
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AmitIT ArchitectCommented:
For Exchange you cannot do in-place OS upgrade. You need to install new server in existing org on 2012 and them move the mailboxes and cutover completely to new server. finally decommissioning old server and then you can use it again for some other app. If it's hardware can support 2012.

For DC, if you have more then one DC. Say you have two DC. You can decom one DC, install 2012 and then promote it to DC. Move FSMO to new server. Decom other DC and rebuild again to 2012 DC. This way you can use same name and IP also.

Let me know, if you need more info.
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Dan PaceIT DirectorAuthor Commented:
Thanks Amit, but I was looking for more specifics.  I read about setting up DAG and running a replication and then pulling the old one off line once replication has completed.  Do you have any guides you can refer me to?

Just want to make sure I'm approaching this in the correct fashion.
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AmitIT ArchitectCommented:
Is your current Exchange environment having DAG?
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Making Bulk Changes to Active Directory

Watch this video to see how easy it is to make mass changes to Active Directory from an external text file without using complicated scripts.

Dan PaceIT DirectorAuthor Commented:
Currently the environment consists of a single exchange 13 server on server 2008 R2.  We have built a new Server 2012 R2 Server and installed exchange 13.  We aren't sure of what steps we should take without creating more work than necessary.  Could we replicate using DAG and then decommission the old or should be manually setup a new server and migrate mailboxes manually which will take days.
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AmitIT ArchitectCommented:
DAG need same OS on both system. in your  case mailbox move is the best option.
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Dan PaceIT DirectorAuthor Commented:
Thank you.  Is there a utility that can run the mailbox move in bulk vs doing it one at a time?
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AmitIT ArchitectCommented:
No extra tool required. Take full backup, before and after moving mailbox.
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AmitIT ArchitectCommented:
As per question asked, right solution provided.
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