PO Box is a single field, not a complete address like Business, Home and
Other. You cannot add a fourth address type to the list.

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Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> I was wondering if there is any way to have the PO Box option in the drop
> down arrow in the address field. The field for PO Box is already defined in
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>
> Indu