This FastMCP server bridges a critical gap for Agent Builder and other MCP-compatible clients by providing a robust email sending capability through Microsoft Graph. Designed to enhance automation workflows, it offers a single `send_outlook_mail` entry point that intelligently handles payload validation, access token acquisition, and interaction with the Graph API's `sendMail` endpoint. It supports both personal and organizational Microsoft accounts with flexible authentication methods, enabling multi-tenant usage without storing sensitive credentials on the server, ensuring secure and scalable email automation.