You can't <schedule> any import or export function via the native Outlook
import/export wizard.
Depending on the importance of your requirement - the following link for
ContactGenie Exporter Advanced may be of interest (supports export templates
which can be run via the commandline which can be invoked by Windows task
scheduler - Outlook not required to be running).
http://www.contactgenie.com/cgxfeatures.htm
Karl
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Karl Timmermans - The Claxton Group
ContactGenie - Importer/DataPorter/Exporter/Toolkit
"Contact import/export/data management tools for Outlook '2000/2007"
http://www.contactgenie.com