1Security File Access Visualization provides visibility and monitoring capabilities for Microsoft 365 environments, including Teams, SharePoint, OneDrive, and Entra ID. The platform maps file access permissions, user memberships, and data exposure across Microsoft 365 infrastructure through a unified dashboard. The tool monitors permission changes in real time and generates alerts for permission drift, external user additions, and "Anyone" links. It tracks historical permission changes with time-stamped logs for audit purposes and incident investigation. The platform integrates sensitivity labels from Microsoft Purview with permission data to identify exposed confidential files. It includes an AI readiness assessment feature that shows what Microsoft Copilot and third-party AI tools can access before deployment. The solution identifies inactive users, abandoned Teams, orphaned OneDrives, and unused SharePoint sites to support environment cleanup. It generates audit reports on permissions and access changes over time, mapping findings to compliance frameworks including ISO 27001, SOC 2, HIPAA, and GDPR. The platform analyzes metadata, permissions, audit signals, and sensitivity labels without accessing actual file content or emails. It scales to support hundreds of thousands of users and sites across Microsoft 365 tenants.