With the Golden Knights triumphing over the Panthers in game 5 of the Stanley Cup, it formally announced the end of all on-ice activity for the NHL in this season's period of time.
The end of the season announces a particular period of time. As confirmed by CapFriendly, the first window of buy-outs will open on Friday June 16th and will only end on June 30th prior to free agency.
The Canucks are in a tight salary cap situation and if they plan on reaching to some free agents, they'll definitely have it find a way out of their tight cap. Buy-outs may be the alternative they need.