OutlookProvider EXCH/EXPR questions for 2007/2013 CoExistence, Outlook connectivity issue

Question

Hi Everyone-
Can anyone give me advice on how to configure my Outlook providers for my environment?
Single 2007 Server in coexistence with separate CAS/MBX 2013 Sp1.
It currently looks like this:
I changed the EXPR CertPrincipleName after coexistence due to a cert pop-up that was occurring in Outlook (2010) while connected to a 2007 mailbox.  
All connectivity and mail flow is working fine, EXCEPT, connecting Outlook to a 2013 mailbox.  It finds the user/mb but fails at login.
Thank you for your time!

Answer 1

Hi Andrew
There is nothing much complicated to think if we use Exchange Server Deployment assistant as it an perfect guide.
http://technet.microsoft.com/en-US/exdeploy2013/Checklist?state=2419-W-EgBEAgAAQAAAAQECAQAAAAg%7e
To allow your Exchange 2013 Client Access server to redirect connections to your Exchange 2007 servers, you must enable and configure Outlook Anywhere on all of the Exchange 2007 servers in your organization. 
Users with mailboxes still on 2007 will be connecting to CAS 2013 and then will be proxied to CAS 2007
Exchange 2013 will coexist easily with 2007 mailboxes by using ActiveSync.  As soon as the DNS entry for 2007 CAS points to the 2013 Client Access Server, 2007 mailboxes that use ActiveSync will be able to sync through the 2013 Client Access server without
any configuration changes.  This is assuming that if the 2007 CAS Servers are using a default configuration such as SSL (443) with basic authentication. Integrated authentication by default should remain enabled on the Proxy folder that is located beneath
the Microsoft-Server-ActiveSync Folder.
During coexistence the 2013 OAB will be the default OAB.Run below command to check
get-mailboxdatabase | fl identity,*offline*
Run below command to change Activesync virtual directory
Get- ActiveSyncVirtualDirectory –Server “Exchange 2013 ServerName” | Set-ActiveSyncVirtualDirectory -InternalUrl "https://abc.com/Microsoft-Server-ActiveSync" –ExternalUrl "https://abc.com/Microsoft-Server-ActiveSync"
Run below command to change the autodiscover url
Get-ClientAccessServer –Identity “2013 Server name” | Set-ClientAccessServer –AutodiscoverServiceInternalUri “https://abc.com/autodiscover/autodiscover.xml”
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