You can't. 6 is the lowest default.

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Diane Poremsky [MVP - Outlook]
Author, Teach Yourself Outlook 2003 in 24 Hours
Coauthor, OneNote 2003 for Windows (Visual QuickStart Guide)
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"R. Barre" wrote in message
...
In OL2003. how can I change the default appointment duration to zero
minutes?