If you have been given access to a GroupCalendar :
Within the GroupOutlook share folder you will see a list of all the folders, they will appear above the list of users you have access to:
To view the GroupCalendar of "Amarillo Office", simply click on "Amarillo Office"
Here you see the GroupCalendar for 05/19/05 showing appointments belonging to Howard and James. If you notice, the appointment belonging to James at 14:00 shows him as Unavailable, this is because this is a Private Appointment.
If you try to add an appointment to the GroupCalendar you will see the following error message:
To add an appointment to another user's calendar, navigate to their name in the list of available users and add an appointment in the same way that you would add an appointment to your own calendar.