During June 2025, Chihiro Matsumoto updated the MicrosoftDocs/azure-security-docs repository to add Windows Server 2025 compatibility information for Microsoft Defender for Endpoint integration. She focused on enhancing the support matrix by editing Markdown documentation, ensuring that security teams and customers have accurate, up-to-date OS compatibility details for deployment planning. Her work improved traceability of operating system support updates, streamlining future audits and onboarding processes. By leveraging her documentation skills and expertise in Markdown, Chihiro delivered a targeted feature that aligns documentation with evolving product capabilities, addressing the need for precise, maintainable records of Defender for Servers’ supported environments.