Locking Public Calendar View
 

I have created a Public Calendar in Exchange, via Outlook 2007. I need to be able to have a group of admins see every entry, past and future, while having everyone else only see future events.

I can create a view and make it the default view for the calendar, but the users are able to change it. I have users as reviewers on the folder but they can still change the view and see all entries.

Any idea on how to lock this down?

tia.