So I have enabled my Calender(Office 2007) to auto-accept new appointments. I have set office hours, the time in which I am available for meetings and such between 8:00 and 18:00. To my surprise some1 succesfully entered a meet for 7:30 am. I would have thought this would not be allowed, since my availability starts at 8:00. How is this possible? Is there a way to prevent ppl from planning a time before/after my start/end time as entered in Calender options?