The OlMeetingStatus enumeration identifies the function of an Appointment item. An Appointment item that has a Recipient List (a list of attendees) functions as a Meeting Request, and Meeting Requests can be Accepted and Cancelled.
The Appointment item is not a Meeting, it is an regular appointment. The user is the only attendee.
The Appointment item is actually a Meeting, and has a list of scheduled attendees.
The meeting request has been received and accepted by at least one of the recipients.
The meeting owner has canceled the meeting.
Beginning with Windows Mobile 6.5, the values of olMeeting, olMeetingAccepted, and olMeetingCanceled, are expressed as values from the OlMeetingStatusFlags enumeration. This update brings Outlook Mobile inline with Microsoft Exchange and desktop Outlook.
For information on how Microsoft Exchange and Outlook handle meeting status, see the Microsoft Support article The "MeetingStatus" Value of Canceled Appointments.