Jem Aswad Senior Music EditorThe three major music companies — Sony, Universal and Warner Music — have asked employees to work from home as much as possible for the rest of 2020 due to concerns over COVID-19.While the offices will be open for employees who must be there for business reasons, according to internal memos obtained by Rolling Stone (which first reported the news) and Variety, the companies, which are the largest recorded-music and music-publishing businesses in the world, have