Does a weapon that has been enchanted to do count as magical to overcome resistances?

@JeremyECrawford Does a weapon that has been enchanted to do (insert extra damage type) count as magical to overcome resistances?

— Mattie Gustard (@Zenophorm) June 28, 2016

Is a magic weapon a magic weapon? See the Sage Advice Compendium: https://t.co/dh02JRnEH8 #DnD https://t.co/7e9NxsTawQ

— Jeremy Crawford (@JeremyECrawford) July 21, 2016