Connecting to Shared Calendars and Mail
In Outlook, click on File - Open - Other User's Folder
Drop the folder type menu down and select calendar
Click on the "Name" button
Type in the name and select the item from the menu, click Ok to add it to your calendar list
It should now be added to your People's Calendar section under your Calendar Items.
To move between the calendars, simply check and uncheck the boxes next to the calendar items