Outlook 2013 not displaying Presence information

Windows 7 (64-bit)
Office 2013 (32-bit)
Office Communicator 2007 (32-bit)
Office Communication Server 2007

Hey everyone, we are having trouble with presence being displayed when using Outlook 2013.
I have some users that are affected, others that are not. So it's a little hard to troubleshoot.

Does anyone have any ideas where we could start troubleshooting?

I know we installed two new Hybrid CAS servers so we can start migrating user mailboxes to O365, but the connectors have yet to be established as we wait on a NLB to be installed.

Would OCS 2007 or the OC Client be looking at a Virtual Directory on the new Hybris CAS servers perhaps for free/busy, while all mailboxes are still on premises?  

Thanks in advance.
Christian HansUndecided... Asked:
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Amit KumarCommented:
Please follow this article to integrate Outlook 2013 with OCS 2007

Registry info from above link:

[HKEY_CURRENT_USER\Software\IM Providers]

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