Talk to your Exchange administrator. THey're probably blocking those replies at the server, with good reason.

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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.slipstick.com/books/jumpstart.htm
> How do I get the out of office Assistant to automatically
> reply to extermnal SMTP accounts it only seems to work
> for the accounts on the internal LAN. We are using
> Microsoft outlook 2002.