How to Create MCP Server for Outlook

Reading, sending, and searching Outlook mail and calendar through the Microsoft Graph API as MCP tools.

Outlook integration examplesGraph API auth tips

Gmail's Official MCP Server, and the Community Alternatives Google Calendar's Official MCP Server, Part of Workspace's Per-App Model OAuth 2.0 in MCP: Implementation Step-by-Step

Outlook mail and calendar both sit behind Microsoft Graph, so a single OAuth app registration and token can back tools for both.

Core Tools

search_mail(query, folder)
send_mail(to, subject, body)
create_calendar_event(subject, start, end, attendees)

Delegated vs Application Permissions

Use delegated Graph permissions when the agent acts as a specific signed-in user; use application permissions with admin consent only for org-wide automation, and scope them to Mail.Read / Mail.Send rather than broader Graph scopes.

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