What is "Treat In/Out Time before Check Out Cut Off Hour as last days' attendance records when import"?
During Attendance Import, any time before that Check Out Cut Off Hour will be treated as previous day attendance,
e.g. 2017/05/07 03:15 will be treated as 2017/05/06 27:15
Which is good for the overnight shift. So that the check out time counted to last work day.