To subscribe to the calendar:
HTML:
https://outlook.office365.com/owa/calendar/916732cc33a9428e9502cea03c80c86a@quacquac.org/1670d2cd79444bdbb835be18c48ec5214693188058675234567/calendar.html
ICS: https://outlook.office365.com/owa/calendar/916732cc33a9428e9502cea03c80c86a@quacquac.org/1670d2cd79444bdbb835be18c48ec5214693188058675234567/calendar.ics