Outlook 2010 not connecting to Exchange 2013 after upgrade

Migrated all Exchange 2007 mailboxes to Exchange 2013.  Now we can't connect to Exchange 2013 with Outlook 2010 clients.  Outlook  2010 clients say "Disconnected".
BMFCAsked:
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IT GuyCommented:
is this happening for all users?

after launching Outlook 2010 did you get a prompt for password?
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Michael WadeDir., Service DeliveryCommented:
What exactly did you upgrade? Did you add an Exchange 2013 server to an existing environment or did you decommission the 2010 server? Are they different forests? Exchange Online?

Make sure Outlook 2010 is patched: http://support.microsoft.com/kb/2687623

Also may want to look at enabling debug logs on one of your clients: http://blogs.technet.com/b/mspfe/archive/2011/04/12/troubleshooting_2d00_microsoft_2d00_exchange_2d00_outlook_2d00_connectivity_2d00_issues.aspx
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BMFCAuthor Commented:
no password prompt. all users are affected.
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Michael WadeDir., Service DeliveryCommented:
So do you have non-2010 users that are able to connect? Please verify whether Exchange is working for anyone at all. Are the services running, can you access the console? Is OWA running?  

Did you upgrade the mail server, or install a new server and move the mailboxes?
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IT GuyCommented:
does OWA work?
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BMFCAuthor Commented:
Upgraded from Exchange 2007 sp3 to Exchange 2013 sp1.  

No users are able to connect via Outlook.  Webmail (OWA) works fine.

Installed new server 2012 R2.  Migrated mailboxes.

Yes, i can access EAC.
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Michael WadeDir., Service DeliveryCommented:
Ok, so at least they can access email via OWA, That will at least give you some breathing room :)

So I presume that they were still able to access their mailboxes on the upgraded server before you migrated them to the new one?
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BMFCAuthor Commented:
The mailboxes were on server 2008 exchange 2007.  We upgraded a different server to 2012 R2.  Then i migrated all the mailboxes from 2007 to 2013.

I've never been able to connect using outlook 2010 to the migrated mailboxes on Exchange 2013.
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Michael WadeDir., Service DeliveryCommented:
Is the old server still available within the existing Exchange org? Can you try moving one of the mailboxes back to the old Exchange server and see if that restores services to that account?
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BMFCAuthor Commented:
we're trying to get the old server back up and running, but we're getting AD errors.
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BMFCAuthor Commented:
ended up migrating all mailboxes ignoring errors.
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BMFCAuthor Commented:
no solution.
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