Check the permissions setting for Default user on his Calendar and then
check the Delegate permissions as well.

Right click the Calendar, Properties, Permissions.

I hope this helps you at least a little bit!

Judy Gleeson
MVP Outlook
Outlook trainer and author of Productiv_IT with Outlook
www.acorntraining.com.au
Canberra, Australia

Imagine if every Thursday your shoes exploded if you tied them the usual
way. This happens to us all the time with computers, and nobody thinks of
complaining.
Jef Raskin, interviewed in Doctor Dobb's Journal