"We also share personal data among Microsoft-controlled affiliates and subsidiaries, including for the purposes described in this privacy statement. We also share personal data with vendors or agents working on our behalf for the purposes described in this statement. For example, companies we've hired to provide customer service support or assist in protecting and securing our systems and services may need access to personal data."
Microsoft shares personal data broadly across its affiliates, subsidiaries, vendors, advertising partners, and third-party publishers (e.g., Xbox game publishers), creating a wide data-sharing ecosystem.