 FORT MILL, S.C.--BUSINESS WIRE--- UFS--Domtar Corporation NYSE: UFS TSX: UFS today announced that John D. Williams will return from temporary medical leave and is resuming authority and responsibility as President and Chief Executive Officer on Monday, March 1st, 2021. Daniel Buron, who assumed Mr. Williams duties during his leave of absence, will continue in his position as Executive Vice President and Chief Financial Officer. Domtars Board of Directors is grateful to Mr. Buron for leading in 