To add a shared calendar in Outlook
Open your calendar
Click on FILE
Click on OPEN & EXPORT
Click on OTHER USER’s FOLDER
In the box, type the name of the calendar (ex. hindleyschoolcalendar)
Make sure folder type says CALENDAR
Click OK
To add a shared calendar on the web
Open your OUTLOOK at portal.office.com
Click on the waffle in the upper left corner
Click on CALENDAR
On the left side of the screen, click on ADD CALENDAR
When the dialog box appears, on the left click on ADD FROM DIRECTORY
In the search line, type the name of the calendar (ex. hindleyschoolcalendar)
Hit enter
Click ADD
Click the X in the upper right-hand corner to close the dialog box