Add Groups Calendars of members as you can in Windows Version of Outlook.
Normally when you ad a user to a Group and the user shares the calendar you would get that users calendar automatically if you add the group the user are a member of. So if you already have that group added to your calendar the users calendar would automatically turn up.
You can also in the windows version of Outlook add the Groups that the users are member of as a shared callender manually. Then all the members of that group's calendar will turn up.
This is not possible in Outlook for mac for some reason.
It gives an error that you should contact administrator which in this case is me.
I also have talked with Microsoft Support over several days and they also found out that it is not currently possible. They also logged this as an incident and would advice development team to add this feature.
But just in case I am asking this community to back this feature.
Sebastian Bauer commented
I would absolutely love to create a group calendar for users that do not have specific Microsoft e-mail addresses or an Microsoft account but instead a different e-mail address, e.g. a @gmx.de, a @bi-berlin.com or a @berlin.de address.
This is possible under Mac Calendar.
jonathan Lunn commented
much needed part of Office 365
In Outlook for business for Windows is possible to see the calendar of each person under the same manager