On November 20, after former OpenAI CEO Altman joined Microsoft, more than 500 OpenAI employees signed a joint letter saying that unless the company's board resigns and re-appoints Altman as CEO, they may resign and join Altman's team at Microsoft.。The letter accuses the OpenAI board of directors, and your actions to terminate Altman's duties and remove Greg Brockman from the board of directors have jeopardized our work and undermined our mission and the company.。Board's actions demonstrate inability to police OpenAI。In the letter, OpenAI employees threaten to join Microsoft with Altman。Microsoft has assured us that all OpenAI employees can take up positions at the new subsidiary if we opt in, they wrote.。