Show Outlook group calendars associated with personal outlook.com account

When you log in to OneCalendar with your personal Outlook.com account, the listed calendars are missing any group calendars that your account is a member of.

For example with the Outlook.com paid Family plan one could have a family group that has all shared events in the group calendar. Currently OneCalendar isn't able to show these groups so any events in the family calendar are hidden.

The groups are such an useful feature in outlook.com but the Outlook iOS app is quite bad so it would be very much appreciated to have support for this in OneCalendar.