Mr., Brad
When I connect and select any table I can see the Outlook contact fields and their datatype to export. How can I determine the field sizes to build a target table with the correct field sizes?

the field sizes are very badly documented by Microsoft and they can differ by version of Outlook. (2000,XP etc).

Try to use our example script for SQL Server
(Example MSSQL Server - Outlook 2000.sql in GeniusConnect install directory), in most cases it will work.