https://www.vice.com/en_us/article/k7eqgx/workers-just-lost-the-right-to-organize-on-company-email

If you’re in the midst of unionizing your workplace, it might seem obvious to you that it’s unwise to organize your coworkers over company email or Slack. Still, it was a protected right workers had. But in a blow to workers, employers can now legally ban company email use for organizing altogether.

On Tuesday, Trump’s National Labor Review Board (NLRB) voted in a 3-1 decision to overturn an Obama-era ruling known as Purple Communications that permitted workers to use company email to discuss union and other non-work related matters. The ruling, issued Tuesday, states employees “do not have a statutory right to use employers’ email and other information-technology resources to engage in non-work-related communications.”