Exchange 2010: Virtualized Exchange 2010 Datacenter Migration

We have a virtualized Exchange 2010 production implementation that needs to be relocated to a new datacenter. We will be leveraging SAN based replication and VMWare to cutover.
Some background info:
3 CAS/HUB servers
4 Node DAG across 2 sites (3 production Mailbox servers in the site to be migrated, 1 mailbox server will not move and be left in DR)
Since I need to shutdown 3 mailbox servers in a 4 node DAG, the cluster will go offline and the databases will dismount. I could run a datacenter switchover to preserve service, but I have the OK to take Exchange completely down. 
Knowing that:
1) What are the best practices to shutdown and start up all the CAS servers and Mailbox servers (both in prod and DR)?
2) Should I suspend replication or dismount the databases in advance and prevent them from automatically mounting on boot up?  Is the StartDagServerMaintenance script relevant in this situation?
Any suggestions on the proper way to go about this is much appreciated.  Thanks for reading.

-->1) During the shutdown...would it make sense to turn off the 4th mailbox server in the DAG which is located in our DR site? I'm thinking that leaving the DR mailbox server powered off and powering it up last among the DAG members would prevent
any database copies from being activated in DR. 
You already have a planned outage. I suggest you shut down the server in DR and start that after starting
all the 3.
2) To be able to mount a database in a 4 node DAG, I need to have the file share witness and two mailbox servers available first...correct?  
Your fileshare witness should be online first otherwise none of your databases will get mounted.
If your DAG contains odd number of members filesharewitness will be ignored, (even number of DAG members will use filesharewitness)http://blog.credera.com/technology-insights/microsoft-solutions/when-do-dags-need-a-file-share-witness/
Thanks, MAS
Please mark as helpful if you find my comment helpful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you.

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    MCSE: Messaging 2013 Charter / Private Cloud / Server Infrastructure
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  • Migrating Exchange 2007 to Exchange 2010 at a different physical location - Suggestions??

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  • Keep exchange 2007 Hub transport & CAS during migration to Exchange 2010

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  • How to migrate public folders from legacy (exchange 2003 ) to exchange 2010

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    Kind regards,
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