To reschedule a meeting, you should follow these steps:

1)Cancel the meeting:

a)Go to ScheduleView/Update my schedule.

b)Look for the meeting that you want to cancel.

c)Click on Cancel meeting.

2)Request another meeting to the counterpart:

a)Go to MatchesMy matches.

b)Look for the participant and click on the Request meeting button.

c)Choose the timetable and send the request.