Microsoft Corp. MSFT, -1.04% said that all employees in the Puget Sound region in Washington state and the San Francisco Bay Area should work from home until March 25 over concerns about COVID-19. For employees whose jobs require them to be in the office, the tech giant is encouraging them to limit "prolonged close interactions with people" and keep in-person meetings as short as possible. It also recommended that others limit travel to those offices unless it is essential. Microsoft's stock was down 1.8% in trading on Thursday afternoon.