Outlook FreeBusy方法提供不正确的输出

Question

参考the question，我已经写了解决方案，但不知怎的，这似乎没有正常工作。我检查过calander并且会议室可用但是根据下面的代码，会议室显示已满，而且我已经看到会议室被预订的反向情况，而下面的代码显示可用性。

import win32com.client
import pywintypes
import datetime

class MeetingRoom:
    def __init__(self,inputDate, duration, locationMail):
        self.inputDate = inputDate
        self.oOutlook = win32com.client.Dispatch("Outlook.Application")
        self.bookings = self.oOutlook.CreateItem(1)
        self.bookings.Start = inputDate
        self.bookings.Duration = duration
        self.bookings.Subject = 'Follow Up Meeting'
        self.bookings.Location = '<Name of meeting room>'
        self.bookings.MeetingStatus = 1
        self.roomRecipient = self.bookings.Recipients.Add(locationMail)

    def checkRoomAvailability(self):
        bookingDateTime = datetime.datetime.strptime(self.inputDate,'%Y-%m-%d %H:%M:%S')
        self.roomRecipient.resolve
        myDate = bookingDateTime.date()
        # print(myDate)
        # myDate = datetime.date(2018, 5, 23)
        pywintypeDate = pywintypes.Time(myDate)
        availabilityInfo = self.roomRecipient.FreeBusy(pywintypeDate, self.bookings.Duration, True)
        timeAvailability = []
        newTime = pywintypeDate
        # print(newTime)
        currentTime = datetime.datetime.now()
        for isAvailable in availabilityInfo:
            # print(newTime, " :: ", isAvailable)
            if isAvailable == "0" and newTime >= currentTime:
                timeAvailability.append(newTime)
            newTime = newTime + datetime.timedelta(minutes=self.bookings.Duration)

        print(availabilityInfo)
        # for value in timeAvailability:
        #     print(value)
        try:
            index = timeAvailability.index(bookingDateTime)
            print("room available")
            # self.bookings.Save()
            # self.bookings.Send()

        except ValueError:
            for timestamp in timeAvailability:
                if bookingDateTime < timestamp:
                    break
            print("I dont see availability of meeting rooms at ", bookingDateTime, " but next available time is ", timestamp)

        # def bookMeetingRoom():

if __name__ ==  '__main__':
    meetingRoomObj = MeetingRoom("2018-05-23 11:30:00",60,"<mail_id_of_meeting_room")
    meetingRoomObj.checkRoomAvailability()