Calendar sharing allows a user to grant access to a nominated delegate. These permissions can be assigned using the 'Calendar Permissions' menu in Outlook 2016 for Mac. 
IMPORTANT: To share your calendar, both you and the person you want to share it with must have Microsoft Exchange accounts.
Instructions are as follows:

1. Open the Calendar Permissions menu

1. At the bottom of the navigation pane, click Calendar.

Screen Shot 2016-08-18 at 11.29.14 am.png

2. Select the calendar you want to share.

3. On the Organize tab, click Calendar Permissions.