A little code snippet might shed some light on how you're using dates to create the appointment.

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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.outlookcode.com/jumpstart.aspx
> I have set up an Access application which uses automation
> to set up appointments in Outlook. It seems to work
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>
> THANKS!