See http://www.slipstick.com/calendar/scheduleall.htm for available
solutions

Signature
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> We want to create a central calendar that would contain information from
> the
> calendars of about 25 people. This would include vacation time, important
> dates in development of projects, other out-of-office information, and
> more.
> We're using Windows XP, Microsoft Office 2003.