Export Your Outlook Contactlist To Csv

To export the address book

• Select "File | Export | Address Book…" from the main menu
• Select "Text File (Comma Separated Values)"
• Click "Export"
• Type a file name in the "Save exported file as" input box.
• For example type, "C:\MYADRBOK.CSV"
• Click "Next"
• Optionally select the fields you wish to export and click "Finish"
• Click "Close" once the exporting is completed

sources
http://www.chami.com/tips/windows/042898W.html