To me the damning parts:
Regardless of when Cheveldayoff believed the meeting occurred, Cheveldayoff recalled being in a meeting in McDonough’s office regarding Aldrich with others in senior management, including McDonough, Bowman, MacIsaac, and Quenneville. He recalled the group was told that there were allegations that Aldrich was socializing with players outside the arena, Aldrich sent inappropriate texts to players, and Aldrich made unwanted advances on players. Cheveldayoff recalled that John Doe and Black Ace 1 were specifically referenced during the meeting.
...
Bowman recalled that, after learning of the incident, Quenneville shook his head and said that it was hard for the team to get to where they were, and they could not deal with this issue now
And apparently there was a follow up phone call between Q and the confidant. So he was well aware of what was going on.