ProPublica is a nonprofit newsroom that investigates abuses of power. Sign up to receive our biggest stories as soon as they’re published. Microsoft, as a provider of cloud services to the U.S. government, is required to regularly submit security plans to officials describing how the company will protect federal computer systems. Yet in a 2025 submission to the Defense Department, the tech giant left out key details, including its use of employees based in China, the top cyber adversary of the U...