So you're saying that if a administrative assistant uses their bosses shared calendar, and adds an event to THEIR calender, the boss does not receive an invatation in e-mail?
This would normal because invitations only people who are initiated to a meeting initiated from someone else.
To get around this: the administrative assistant should share her calendar with the boss, then invite him to events. Then when he accepts, they will appear on HIS calendar, and he will receive notification.
jh
(if I'm wrong, then pm me so that I can re-check the thread.

)