You can allow access to a meeting room based on bookings in that room’s calendar that might be on another platform, such as Microsoft 365.
With booking-based access, a room still has an access schedule (see Create and manage access schedules) but the schedule is overridden when there is a booking, allowing access only to users on the booking invite.
Users and groups in Access all the time section of the access schedule retain access during a booking.
Accessia can read bookings from a Microsoft 365 room calendar.