Follow the steps below to add another users shared calendar to your Outlook on the web and Outlook desktop app.
- Login to Outlook for the web https://outlook.office365,com with your email address and then select Calendar icon, then select Add calendar
- Select Add from directory Use your email address in the Please select an account to search from
- Enter the name, email address of the users calendar to be added
- Once the other users shared calendar has been added then select Other calendars from the dropdown box and select Add.
- The calendar will appear in the web app and appear in Outlook desktop app as an additional calendar.