Outlook Calender option not in Zoom App on Mac

Hello,

I have a user who uses Zoom app on their Mac laptop. When scheduling a meeting, under the Calendar section there is only iCal, Google calendar, and Other Calendar, but no Outlook.

I have reinstalled the Zoom  app (version 5.15.11), integrated his calendar to Office 365 via the web portal, and signed out and back in.

I see videos of other Mac users, who have the outlook option under Calendar. Is there something I am missing?

Thank you in advance!