How to open a shared calendar in Outlook

Once you’re added as a member of a shared mailbox, you will also have access to the shared calendar.

Here’s how you can access shared calendar in Outlook:

1. Launch Outlook then click Calendar.
   
   

2. Under Home tab, click Open Calendar (or Add Calendar).
   
   

3. Click Open Shared Calendar from the drop-down menu.
   
   

4. Type the name of shared calendar, then click OK. The shared calendar appears next to any calendar that is already in the view.
   
   
   
   

Note: The shared calendar will be added to the Navigation Pane after you access it for the first time.

Source:

Opening a Shared Calendar in Outlook