Choose Compare Calendars from the Browse menu.
Select one or more entries in the Browse list that you want to check for access.
Click Schedule to open the Group Appointment Editor.
Look at the Calendar Access list.
The Calendar Access list displays the calendar names that you selected in the Compare Calendars dialog box.
A "Y" in the Access column means you have insert access. An "N" means you don't.
To add appointments or To Do items to other calendars, ask the owners to grant you insert access. To find out how to grant or deny access to your calendar by others, see "Changing Access and Permissions".