Add Shared Calendar in Outlook Desktop

Steps:

1. Open Microsoft Outlook.

2. Click the Calendar icon on the left-hand navigation pane.

3. On the Home tab, click Add Calendar.

4. Select Open Shared Calendar.
   
   

5. Search for the Shared Calendar.
   
   Example: 
   
   

6. Click OK.
    

7. The Shared Calendar will appear under Shared Calendars.