Outloo 2010 Modify Exchange Server setting in BULK

I just finished migrating from Exchange 2007 to Exchange 2010.  All client are using Outlook 2010 or 2013.  I now need to point everybodies Outlook to the NEW Exchange Server.

Is there a way to do this in bulk?  Maybe GPO, or OCT?

Please help....
BSModlinAsked:
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tshearonCommented:
You should not need to do a things as long as you have moved the mailboxes then they should already be working. That is unless you have issues with Autodiscover or other problems. Are you having issues?
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RantCanSr. Systems AdministratorCommented:
Exactly, that is what autodiscover is for, to find the mailbox based on email domain.

Try this: https://www.testexchangeconnectivity.com 

It will allow you to check your autodiscover.xml.
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Gareth GudgerCommented:
If you are having problems with autodiscover then check this article. It goes through all certificate, split-brain DNS and URL requirements for a fully functional Exchange 2010 server.
http://supertekboy.com/2014/05/27/designing-a-simple-name-space-for-exchange-2010/
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suriyaehnopCommented:
After you successfully install Exchange 2010 CAS server. you shall point the namespace to Exchange 2010 CAS server.

http://blogs.technet.com/b/exchange/archive/2014/03/12/client-connectivity-in-an-exchange-2013-coexistence-environment.aspx

After you move the mailbox to new server, the Outlook will use autodiscover to discover the new settings and change accordingly
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BSModlinAuthor Commented:
I believe this only happens if both exchange servers are up and running.  What if I performed the migration over the weekend and decommissioned the old server before users opened there outlook and had there settings migrated??
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Gareth GudgerCommented:
What exactly is the issue?

If you move a mailbox to the new server Outlook should automatically reconfigure itself. No manual intervention required.

Autodiscover will need to be configured correctly. Check my previously linked article on how to do that.
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tshearonCommented:
Bsmodlin, it shouldn't matter. Can you tell us what the problem is?
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