To ensure that a meeting room can only be booked by room managers, the meeting room must be designated as an exclusive room, and room managers must be assigned to it.
Procedure in the FM Portal
Path to the starting point: Infrastructure Building Management - Room Reservation - Meeting Rooms
Open the record for the meeting room you want to designate as an exclusive room.
In the Booking Restrictions section, check the "Bookable only exclusively?" checkbox.
Click Save in the toolbar.
Assign the room managers to the meeting room via the "Responsible Persons for the Meeting Room" section.
Room bookings can only be made by the room managers.