To view another person’s calendar, Click Open Calendar at the top, then Click From Address Book.
You will then type in the person’s name for the calendar you want to open, last name first. Double-click the name and then Click OK at the bottom. If that person has shared their calendar with you through their Outlook, their calendar will open and be added to your Shared Calendars at the far left of your Calendar view. You can now access it with one click whenever you need to view it. You can display several calendars at the same time.