mfcmapi

Description: MFCMAPI provides access to MAPI stores to facilitate investigation of Exchange and Outlook issues and to provide developers with a sample for MAPI development.
Interface: Windows GUI
License: Freeware
Homepage
Platforms: Windows 32-bit, 64-bit (match to installed version of office)
Commentary: Advanced tool. Use it to get at autocomplete entries and much of the underlying MPI interface
Usage Example: Download and run the tool.

Screenshot:

Extended information:

1. Autocomplete data is stored in - these files can be simply renamed to be re-used: 

%localappdata%\Microsoft\Outlook\RoamCache

2. More details about using this tool to get at auto-compete data.