Not if you're using ActiveSync as the synchronization tool. You'd need a third-party tool; see http://www.slipstick.com/addins/olpda.htm

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Sue Mosher, Outlook MVP
Outlook and Exchange solutions at http://www.slipstick.com
Author of
Microsoft Outlook Programming: Jumpstart
for Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Does anyone know if you can 2 way sync the user-defined
> fields in Outlook with Contacts on my HP Jornada that is
> running Pocket PC?