Put the .pst file holding the data in a folder accessible to both users.

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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
> If there is any way to copy down the address book and email messages from
> Outlook in different window accounts (on the same machine). Both account
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> could
> be copy down to the Outlook in different Window account?