Outlook Semantic MCP - Technical Reference

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Overview

This section contains detailed technical documentation for developers and architects working with the Outlook Semantic MCP Server.

Note: The Outlook Semantic MCP Server is both an MCP server and a connector — it exposes 10 mail MCP tools (plus 4 debug-mode tools), and 8 more calendar tools when CALENDAR_INTEGRATION is enabled. AI clients invoke those on demand, and once a user connects their account, the server automatically syncs their emails into the Unique knowledge base in the background. This contrasts with pure connector-style servers (like Sharepoint Connector) which ingest data silently without exposing tools.

Documentation

Document	Description
Architecture	System components, modules, database schema, and RabbitMQ topology
Flows	Sequence diagrams for OAuth connection, email sync, and subscription lifecycle
Permissions	Microsoft Graph permissions with least-privilege justification
Security	Encryption, OAuth 2.1 with PKCE, token rotation, and threat model
Subscription Management	Subscription lifecycle, renewal, status, and failure handling
Features	User-facing features, what's supported, what's not, and setup steps (including delegated access and calendar)
Tools	Full reference for mail tools, debug tools, and calendar tools
FAQ	Frequently asked questions