Maybe you're not really sending .ics files at all? What steps are you following? In what version of Outlook?

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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
> Why is it when I send iCalenders (ics file) from home to work, they
> they get converted to a .msg files? Does anyone have a fix for me?