Here is an excerpt from the ESPN article.
Adrian Wojnarowski Senior NBA Insider:
Williams, who was voted the National Basketball Coach's Association's coach of the year in consecutive seasons, had two years left on his original five-year deal, and now moves under contract for several more years, sources said.
Williams' impact on the Suns' organization has been profound, including a trip to the 2021 NBA finals and a franchise-record 64 regular-season victories last season. Williams has gone 149-78 (.656) in his three seasons and delivered accountability and purpose to a wayward Suns' program, transforming a team that had won 19 games prior to his arrival into one of the league's best teams.
Phoenix Suns coach Monty Williams, who had two years left on his five-year deal, now moves under contract for several more seasons, sources told ESPN.
www.espn.com