Employees Stamp

Luca2020 
Please try the following query.

Actually I'm dealing with an attendance data that is much more complex than yours. I tried to simplify for your case. Hope it works.

AttendanceNew =
VAR T1 =
    SELECTCOLUMNS (
        FILTER ( AttendanceSource, AttendanceSource[tipologia] = "IN" ),
        "Emp.No.", AttendanceSource[empl_id],
        "@Date", DATEVALUE ( AttendanceSource[datd] ),
        "ClockIn", AttendanceSource[data]
    )
VAR T2 =
    SELECTCOLUMNS (
        FILTER ( AttendanceSource, AttendanceSource[tipologia] = "OUT" ),
        "Emp.No.1", AttendanceSource[empl_id],
        "ClockOut", AttendanceSource[data]
    )
VAR T3 =
    GENERATE (
        T1,
        VAR TimeIn = [ClockIn]
        VAR DateIn =
            DATEVALUE ( TimeIn )
        VAR T4 =
            FILTER ( T2, [Emp.No.1] = [Emp.No.] && [ClockOut] > TimeIn )
        VAR T5 =
            FILTER ( T4, DATEVALUE ( [ClockOut] ) = DateIn )
        VAR T6 =
            FILTER ( T4, DATEVALUE ( [ClockOut] ) = DateIn + 1 )
        VAR ClockOut1 =
            MAXX ( T5, [ClockOut] )
        VAR ClockOut2 =
            MINX ( T6, [ClockOut] )
        VAR ClockOut =
            COALESCE ( ClockOut1, ClockOut2 )
        RETURN
            ROW ( "ClockOut", ClockOut )
    )
RETURN
    T3