I must be doing something wrong, but no matter how I set up a user's provile (specifically Calendar tab) User A can see User B's activities.

If I set it up where User A can invite user B to a meeting or other event, User A can see all of user B's when viewed in the Activity view.  Besides the Calendar tab in administrator is there anything else that controls who sees what?

Hi,

If you are referring to personal activities as per your subject? They can be viewed by other users who have access to your calendar but they cannot see the detail.

Regards, Adam Travers

Maybe it's my installation or my customizations, but User A can see User B's activities(meetings) weather user A is a member(invitee) or not. User A can open and view all details of all other's activities.