On the left side of the screen, you will see an icon with three horizontal lines. After clicking this you will see a drop-down menu with the list of calendars that you have available to view. Click the button above the list that says Add Calendar.

A window should pop up with a list of options on the left side. Click Add from Directory.

Type in the name or email of the user whose calendar you would like to add and choose their name when it pops up.

Choose which category of calendars you would like to add your calendar to. There is no difference in the categories in how they will affect the calendar that you are adding—they were simply pre-created by Outlook to assist in organizing.

Click Add.

Exit out of the add calendar window by clicking the X in the top right corner. Now you should see the added calendar among your list of calendars in the category where you added it.

If you ever wish to remove this person’s calendar, hover your cursor over their name and click the three dots that appear to the right of it. Click Remove.