This is the minimal right required to view appointments in the calendar. Appointments can be edited from the browser. In the "Belbo Light" app, appointments cannot be entered without this right.
Attention: If only this right is set, work time start and work time end cannot be recorded from this login.
If a login should not have any permissions at all, at least this right must be granted so that the login can view the calendar of the current location. Subsequently, restrictions can be defined in the user's profile. More information on this here: Login with restricted rights.