The other users need to either send you iCalendar items or send you regular Outlook meeting requests with your address set for rich-text format. In other words, there's nothing you yourself can do to change the behavior.

Signature
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> This seems to pop up all the time by does not provide an answer:
>
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> meeting. How do I make my Outlook calendar interactive with other users over
> Internet?