18 hours is the default for all-day events and cannot be changed.

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Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
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> Actually, my defauly reminder is set to 30 minutes, but
> all meetings start with an 18 hour reminder time. Any
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>
> Andrew
Cryptk - 08 Jun 2004 18:01 GMT
I have the same issue and it's not just happening on all day
appointments. All standard meeting requests are defaulting to 18
hours. It should be 15 minutes.
> 18 hours is the default for all-day events and cannot be changed.
>
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> >
> > Andrew
I have not been able to find a reply to this last posting
on the message board. Does anyone know if this has been
resolved?
I also have the same issue where the default is 18 hours
on all standard meetings as well.
>-----Original Message-----
>I have the same issue and it's not just happening on all day
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>> > Andrew
>.