Open Outlook
Go to the Calendar view
Click Add Calendar
Select From Address Book or Open Shared Calendar
Search for the person’s name
Select the calendar
Click OK or Add
If prompted, request permission from the calendar owner
If you already have access, the calendar will open in your calendar list
In Outlook on the web, click Calendar
Click Add calendar
Choose Add from directory or From people
Enter the person’s name
Select the calendar and add it
If the calendar is shared with you, it will appear in your calendar list