At 19:27 of the third period in the Canucks/Capitals game, the Situation Room initiated a review under the terms of a Coach's Challenge to review the "Interference on the Goalkeeper" decision that resulted in a "no goal" call.
After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee determined that Washington's Justin Williams interfered with Vancouver goaltender Jacob Markstrom before the puck crossed the goal line.

Therefore the original call stands - no goal Washington Capitals.
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NOTE: In the final minute of play in the third period and at any point in Overtime (Regular Season and Playoffs), Hockey Operations will initiate the review of any scenario that would otherwise be subject to a Coach's Challenge.