Tesla: The NLRB Upholds Limits on Work Email, Teams Chats and Company Devices Under Caesars

Your employer’s policy says company email, Teams and work devices are for business only, and you want to talk with coworkers about pay or a union. Under Tesla, Inc., 375 NLRB No. 63 (Oct. 28, 2026), a rule like that is lawful under federal labor law unless employees have no other reasonable way to communicate or the employer applies it to single out protected activity. The General Counsel argued neither point, and a three-member Board panel adopted an administrative law judge’s dismissal of the complaint against Tesla’s Acceptable Use Policy for Workplace Technology. The decision is agency precedent, though the members’ footnotes leave both competing tests open to reconsideration.

What Tesla’s workplace technology rules said

Workers United’s Rochester Regional Joint Board filed the charges; Tesla operates a manufacturing facility in Buffalo, New York, where the case was tried. The policy covered Tesla IT systems and Tesla-issued devices and protected “Tesla Business Information,” defined to include trade secrets, pricing, customers, suppliers, nonpublic financial information and intellectual property. Version 1.3 issued in February 2023; version 1.4 replaced it that September. The case was tried on documents and stipulations.

The challenged rules barred, among other things, recording meetings without participants’ knowledge, spam, unauthorized religious or political solicitation, moving Tesla Business Information from a Tesla device to a personal device, “Forwarding Tesla work documents, work emails and/or Teams chats to your personal email or any unauthorized email accounts,” and creating Teams or Mattermost channels for communications that interfere with work.

Both versions said nothing in the policy was intended to restrict employees’ rights to share information about wages, benefits and working conditions, except documents containing Tesla’s trade-secret, proprietary or confidential business information. February tied those rights to “local law”; September changed that to “applicable law.” The September version also stated that, for U.S.-based employees, Tesla Business Information excludes employment information “such as wages, benefits, and terms/conditions of employment, which are not restricted from disclosure by Company policy.” It narrowed the recording rule and allowed signing in to Tesla information on a personal phone. At trial, the General Counsel withdrew the allegation that Tesla adopted the rules to discourage union activity, leaving only the claim that the rules were overbroad on their face.

Why the case was decided under Caesars, not Stericycle

Stericycle, Inc., 372 NLRB No. 113 (2023), governs work rules that do not expressly restrict protected activity: a rule that reasonably tends to chill protected activity is presumptively unlawful unless the employer shows a legitimate and substantial interest that a narrower rule could not serve. Caesars Entertainment, 368 NLRB No. 143 (2019), governs rules about employees’ use of employer IT. As the judge described it, an employer may restrict “the nonbusiness use of its IT resources” unless the General Counsel proves that employees would otherwise lack any reasonable means of communicating with each other, or proves discrimination. The Board’s Pro Residential Services, 373 NLRB No. 100 (2024), placed rules on company equipment and electronic communications under Caesars.

The General Counsel did not claim discriminatory application or a lack of alternative means. It argued instead that because the policy also controlled Tesla Business Information, Stericycle should govern. The judge rejected the split. The equipment rules and the information rules were “integrally connected as a comprehensive workplace policy,” and separating them would contradict Caesars.

The forwarding argument and the business-information rules

The fallback argument was that, even under Caesars, the February rules against moving business information to personal devices and forwarding work email or Teams chats to personal accounts reached employees’ own devices. The judge called that creative but unpersuasive. A transfer from company equipment to a personal device necessarily uses the company’s equipment, so it falls under Caesars: “a transfer without a transferor is by definition impossible.”

The judge gave a second reason. In both versions, the information defined as Business Information was confidential or proprietary and “cannot be reasonably construed by employees as encompassing their Section 7 activities.” (Section 7 protects employees acting together about pay and working conditions.) The judge concluded the rules were lawful and recommended dismissal.

What the Board decided, and what the footnotes add

The Board affirmed the judge, adopted the recommended order and dismissed the complaint. Three footnotes in the Board’s decision matter.

First, the Board granted the Acting General Counsel’s unopposed motion, filed under GC Memorandum 25-05, to withdraw the exceptions asking the Board to reconsider Caesars and seeking additional remedies. Whether Caesars should be overruled was therefore not before the Board.

Second, having dismissed the complaint, the Board found it unnecessary to address Tesla’s cross-exceptions arguing that parts of the National Labor Relations Act are unconstitutional.

Third, Chairman Murphy and Member Macy agreed that Stericycle did not apply; they did not participate in that decision, did not pass on it and “would be open to reconsidering Stericycle in a future appropriate case.” Member Prouty joined in applying Caesars as extant law but “expresses no opinion about whether Caesars was correctly decided” and would be open to reconsidering it.

What it means if you use company email or chat

In our reading, a business-only rule for company email, Teams or devices is generally lawful under Caesars, and a challenge needs facts this case did not involve. One is discrimination, such as an employer that tolerates personal Teams chatter but enforces the policy against union or pay talk. The other is the rare workplace with no other reasonable way for employees to reach each other; the judge put that burden on the General Counsel and presumed modern employees have personal equipment.

The case tested only whether adopting and keeping the rules was lawful, so a worker disciplined for a union message on Teams while others chat freely presents a different question. Our practical suggestion: talk about pay or organizing through personal channels, and do not forward company documents or chats to a personal account; Tesla’s forwarding rule survived this challenge. A confidentiality rule that reaches employee information raises a different problem, as our analysis of Hoffmann Brothers explains.