Business and management groups want federal regulators to prohibit employees from discussing workplace conditions and union activity on company-owned email, in case being weighed by President Donald Trump’s National Labor Relations Board that confronts how technology clashes with labor law.

The advocates for business want the labor board to overturn Obama-era precedent that allows employees to use work email for communication about, among other things, workplace conditions and union-organizing activities. The business groups contend the use of email for those purposes is a “needless infringement on employers’ rights.”