Open Shared Calendar on Outlook 365 App using iCalendar file

Use Case: You would like to open a shared calendar on your Outlook 365 app via iCalendar (ICS) file download

These instructions are not intended for web-based Outlook or the new Outlook app

1. To download, click the ICS calendar link that was shared with you
2. Open Outlook 365 App
3. Select File > Open & Export > Open Calendar
4. Select the download ICS calendar link > OK 
5. Outlook Security notice will pop-up. Verify that this is a legitimate shared calendar link prior to selecting Yes to continue. 
6. Select Open as New 

You can rename the calendar to reflect appropriate calendar name