 FORT MILL, S.C.--BUSINESS WIRE--- UFS--Domtar Corporation NYSE: UFS TSX: UFS announced that John D. Williams, President and Chief Executive Officer, has contracted the Covid-19 and is taking a temporary medical leave of absence. The companys Board of Directors has appointed Daniel Buron, Senior Vice-President and Chief Financial Officer, to assume Mr. Williamss authority and responsibility until he returns from his leave of absence. Mr. Buron will continue in his role as Senior Vice President 