Create calendar event location declined

Question

Hi,

I am creating a calendar event with a location (room) defined and included as an attendee of type resource.
When there is no BookInPolicy on the room, the booking goes through fine.
When there is a BookInPolicy, the event is created on the users calendar however the location (room) automatically rejects the event. I can't see anything in the response that would notify me to this.
Is there a way I can see this in the response or any data on the room that would tell me how to access this to know it can't be booked by the user in question?

Thanks,
David