At 11:22 of the second period in the Red Wings/Canadiens game, Detroit requested a Coach's Challenge to review whether Paul Byron interfered with Detroit goaltender Jimmy Howard prior to his goal.
After reviewing all available replays and consulting with the referee, NHL Hockey Operations staff determined that Byron pushed Howard's pad which caused the puck to cross the goal line. According to Rule 78.7, "The standard for overturning the call in the event of a 'GOAL' call on the ice is that the Referee, after reviewing any and all available replays and consulting with the Toronto Video Room, determines that the goal should have been disallowed due to 'Interference on the Goalkeeper,' as described in Rules 69.1, 69.3 and 69.4 ."
Therefore the original call is overturned - no goal Montreal Canadiens.
Since the Coach's Challenge resulted in the original call being overturned, the Detroit Red Wings retain their time-out.