Add Calendars to Your Outlook Mailbox
Open your Outlook mailbox (https://outlook.office.com) and choose your calendar.
Click the “Add calendar” option.
Choose “Add from directory”
Type in the calendar you’d like to add. In this example we are adding the M1 Calendar (m1cal).
Select the calendar that is suggested and then choose where you’d like to add the calendar in your Outlook, and then add.
The added calendar will appear under the heading you chose.
