In an effort to help emergency services and governments deal with the ongoing coronavirus outbreak, Facebook has announced that it will offer the premium version of its workplace chat service, Workplace Advanced, to them for free for 12 months.
http://www.techradar.com/news/facebook-is-making-workplace-advanced-free-to-emergency-services-and-governments
http://www.techradar.com/news/facebook-is-making-workplace-advanced-free-to-emergency-services-and-governments