If you encounter that you do not have permission to share your own Calendar. When I done this for Neuromod Medical It turned out that the user had shared her own calendar to herself with view only permissions on a local Outlook on their PC and then ...
First of all go to Configuration - Groups - Then - Site Groups Select the site in question and create a new rule, give it a name and description. Go to manual inclusion to add in the devices in question, add and filter by to none. Select devices. ...