Closed Issue: Cannot Open MAPI Store - Exchange 2010 [15713]

We're running the latest release of MFCMapi and discovered that we can no longer connect to our Exchange 2010 mail store. We currently have Outlook 2007 installed on the client.

Error:
Code: MAPI_E_FAILONEPROVIDER == 0x8004011D
Function CallOpenMsgStore( lpMAPISession, (ULONG_PTR)m_hWnd, lpEntryID, ulFlags, (LPMDB*) lppMAPIProp)
File MainDlg.cpp
Line 436

Any idea what this means? I tried installing ExchangeMapiCdo.msi, but it won't allow me to if Outlook is already installed.

I can open Sharepoint Lists store, but not my default store Mailbox or Public Folders.
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