Microsoft confirmed on Friday that it will no longer allow China-based engineers to access Pentagon cloud systems after concerns were raised that such actions threatened United States national security.

“In response to concerns raised earlier this week about US-supervised foreign engineers, Microsoft has made changes to our support for U.S. Government customers to assure that no China-based engineering teams are providing technical assistance for DOD Government cloud and related services,” Microsoft’s chief communications officer, Frank Shaw, told the Washington Examiner. “We remain committed to providing the most secure services possible to the U.S. government, including working with our national security partners to evaluate and adjust our security protocols as needed.”