Add/Subscribe to Public Folder Calendars?

All..

My organization (austin.utexas.edu) is utilizing the Office365 / Outlook365 products.  I use a Mac and have my email and calendar working using the Mac OS X native applications (Mail, Calendar, etc..).  I am not using Outlook for Mac.   I want to subscribe or add a calendar that shows up on Outlook for Mac to my OS X Calendar.

It shows up in Outlook for Mac as:

[ √ ] Subscribed Public Folders
      [ √ ] ITS - jewettg
           [ √ ] UTnet Calendar

I am sure it is just a matter of figuring out the shared URL, or flipping a bit.  I want to do this on my Mac desktop and my iOS based iPhone.

THANK YOU!!