During April 2025, Matt Geim focused on modernizing authentication documentation within the OfficeDev/office-js-docs-pr repository. He updated the guidance for Outlook add-ins to remove outdated recommendations around using Exchange identity tokens, aligning the documentation with current best practices for SSO token authentication. Working primarily in Markdown, Matt emphasized clarity and maintainability, ensuring that developers onboarding to the platform could more easily implement secure authentication flows. His work improved the overall consistency of the documentation and contributed to a stronger security posture by reducing potential misconfigurations. The effort centered on documentation skills and a deep understanding of authentication technologies and workflows.