Can my need be solved with a group calendar or any other function in Exchange/Outlook?

I will try to express our need for our "Project Office" and is interested in how this can be solved using Outlook/Exchange.

Our Project Office is in charge of several Projects and the Project Office Manager is interested to have a single calendar view with all activities for the different Projects.

The Project leaders and the Project Office Manager also have other activities that they don't want to show up in the Project Office calendar. They do not want to register activities two times, one in the personal calendar and one in the Project Office calendar.

A possible scenario could be to handle the Project Office calendar as a resource or aaddressee that can be included in those activities that should be included in the Project Office calendar (with the difference that double bookings should be allowed).

Scenario:

Project Manager 1 invites to a steering group meeting for project A. She invites all participants, a room and the "Project Office calendar"

Project manager 2 invites to a sprint demo for project B. He invites all participants, a room and also the "Project Office calendar"

The Project Office manager (and others) can see all activities in the Project Office calendar. They can also use the calendar for planning so that important activities will not collide.

Thanks for ideas in how to realize this scenario.