Open up your calendar in the Outlook app for Windows. 

In the toolbar at the top, click the three dots on the right side. Note: if you are using the new version of the Outlook App, follow the instructions for how to add a calendar in the Browser version of Outlook.

Hover your cursor over Add, and click Open Shared Calendar.

A small box should pop up on your screen. Click Name...

A new window will pop up that will allow you to search for the person whose calendar you would like to add. The default option is that you can only search up users by their last name and then first name. To give you more search options, you can click the circle next to More Columns, which is located above the search bar. Using this option, you can search by first name and then last name, email, department, etc. Once you have searched up and located the user whose calendar you would like to add, click on their name so that it is highlighted and click OK.

You can select the calendar to view on the left side of the screen where your list of calendars is located. It is specifically listed under the “Shared Calendars” category.

To remove the calendar, right-click on the user’s name and click Delete Calendar.