This move follows a damning investigation by ProPublica, which revealed that Chinese nationals had been participating in sensitive defense-related IT projects. While these individuals were ostensibly monitored by American employees dubbed "digital escorts," the system operated with little oversight or technical vetting. These escorts, according to the report, often lacked the necessary expertise to identify malicious code or suspicious behavior.
Microsoft’s head of communications, Frank Shaw, stated that the decision was prompted by recent scrutiny of foreign involvement in U.S. defense technology. In a post on X (formerly Twitter), he emphasized Microsoft’s commitment to national security, writing:
“We are dedicated to providing the U.S. government with the most secure services possible, which includes continuously reviewing and adapting our security protocols in coordination with our national security partners.”
In response to concerns raised earlier this week about US-supervised foreign engineers, Microsoft has made changes to our support for US Government customers to assure that no China-based engineering teams are providing technical assistance for DoD Government cloud and related…
— Frank X. Shaw (@fxshaw) July 18, 2025
The issue gained political traction earlier this week when Senator Tom Cotton sent a formal letter to Secretary of Defense Pete Hegeth, voicing deep concerns about Chinese personnel’s involvement in Pentagon IT operations. In his letter, Cotton noted that U.S. citizens were acting as monitors, or "digital escorts," for Chinese engineers, but warned that many lacked the technical knowledge to detect potential security threats. He demanded transparency from Microsoft, requesting detailed information about contractors employing Chinese engineers, the subcontractors hiring the digital escorts, and the nature of their security training.
In his letter, Cotton emphasized that one of the most severe and aggressive threats to the United States is China's cyber capabilities national interests, citing past intrusions into critical infrastructure, telecom networks, and supply chains as evidence.
Secretary Hegeth echoed these concerns on X, stating that he agreed with Cotton’s assessment and disclosed that the Department of Defense was already reviewing the issue. He asserted:
"Department of Defense systems should never be accessible to or maintained by foreign engineers, particularly those headquartered in China."
In light of recent and concerning reports about Microsoft using engineers in China to maintain DoD systems, I’ve asked @SecDef to look into the matter.
— Tom Cotton (@SenTomCotton) July 18, 2025
We must guard against all threats within our military’s supply chain. pic.twitter.com/Q8KZk5itz1
An internal Microsoft practice that began in 2016 and had U.S. supervisors overseeing Chinese developers was made public by the ProPublica exposé. personnel who essentially copied and pasted commands into federal cloud systems on their behalf. The process, the investigation found, functioned with minimal review or scrutiny. One anonymous whistleblower admitted, “We hope there’s nothing malicious happening, but we really can’t be sure.”
This incident is the latest chapter in a broader U.S. crackdown on Chinese access to sensitive American technology and infrastructure. Earlier this year, the Federal Communications Commission barred electronics manufacturers from using Chinese testing labs for product certification. More recently, the agency has pushed for bans on Chinese companies managing undersea internet cables that connect to the U.S.
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