"There are seldom technological solutions to behavioral problems."
Having said that, look under the Calendar planner options and make sure that
the option to refuse conflicting appointments is checked.

Signature
--?
Milly Staples [MVP - Outlook]
Post all replies to the group to keep the discussion intact. Due to
the (insert latest virus name here) virus, all mail sent to my personal
account will be deleted without reading.
After furious head scratching, Simon asked:
| I accidentaly didn't see that my boss had a meeting at 9:30 and booked
| another meeting with him at the same time and Outlook 2003 says
[quoted text clipped - 3 lines]
|
| Simon