Outlook Legacy MCP

Connect Claude Desktop to legacy Microsoft Outlook installations through Windows COM automation.

This project is designed especially for Outlook 2007 and similar legacy desktop Outlook environments where modern Outlook/Microsoft 365 integrations may not be available or practical.

How it works

Claude Desktop
      |
      | MCP
      v
Outlook Legacy MCP Server
      |
      | Windows COM / MAPI
      v
Microsoft Outlook Desktop
      |
      v
Configured Outlook Mail Profile

The MCP server runs locally on the Windows computer. It does not connect directly to Exchange, IMAP, SMTP, or Microsoft Graph.

Related MCP server: outlook-mcp

Key feature: no Outlook credentials in the MCP

The server does not ask for or store:

• Outlook username

• Outlook password

• Exchange server details

• IMAP/SMTP credentials

• Microsoft Graph credentials

• OAuth tokens

Instead, it uses the Outlook desktop application and the mail profile already configured on the local Windows machine.

Current MCP tools

Requirements

• Windows

• Microsoft Outlook 2007 or another COM-compatible desktop Outlook version

• Python 3.10+

• Claude Desktop

• A configured Outlook mail profile

Outlook should have been opened at least once on the computer so that its profile is configured.

Installation

Clone the repository:

git clone https://github.com/jatinpurba/outlook-legacy-mcp.git
cd outlook-legacy-mcp

Install dependencies:

pip install -r requirements.txt

You can also install them directly:

pip install pywin32 mcp

Configure Claude Desktop

Open the Claude Desktop configuration file:

%APPDATA%\Claude\claude_desktop_config.json

Add the following MCP server entry. Replace the path with the actual location of the Python file on your computer:

{
  "mcpServers": {
    "outlook-legacy": {
      "command": "python",
      "args": [
        "C:\\path\\to\\outlook-legacy-mcp\\outlook_mcp_server.py"
      ]
    }
  }
}

Save the configuration and fully restart Claude Desktop.

The Outlook tools should then be available to Claude.

Example prompts

Once connected, you can ask Claude things such as:

Show me my latest 10 emails.

Show me my unread emails.

Read the latest email from John.

Create a draft response to this email.

Create a draft email to customer@example.com with the subject
"Project Update".

Use extra caution with send_email, because it sends the message through your configured Outlook account.

Security and privacy

This MCP server runs locally on your Windows computer.

The MCP itself does not collect or store Outlook credentials. It accesses the Outlook profile through the locally installed Outlook application.

However, the MCP tools can access mailbox content and can send email. Only run the server on a trusted computer.

Before using automated sending, review the recipient, subject, and content of messages generated by an AI system.

Outlook may display a security prompt when a program attempts to send mail on your behalf. This is an Outlook security feature.

Limitations

• Windows only

• Requires desktop Outlook

• Requires a configured Outlook profile

• Uses Outlook Windows COM automation

• Intended for local use rather than server-side/headless deployments

• Outlook may need to be running or launchable for COM operations

• Outlook security prompts may appear when sending mail

• The current implementation is focused on email operations

Why not Microsoft Graph?

Microsoft Graph is an excellent option for modern Microsoft 365 environments.

This project targets a different use case: legacy desktop Outlook.

If you are using Outlook 2007 or another legacy environment where modern Outlook/Graph-based integrations are unavailable or impractical, this project provides a local COM-based MCP bridge.

Architecture

The server uses Python, pywin32, Outlook COM automation, and the MCP Python SDK.

The MCP server obtains the Outlook application through COM and accesses its MAPI namespace. It therefore uses the Outlook profile already configured on the machine rather than implementing a separate mail-server authentication flow.

Development

Install dependencies:

pip install -r requirements.txt

Run the server:

python outlook_mcp_server.py

The server is intended to be launched by an MCP-compatible client such as Claude Desktop.

Contributing

Issues, improvements, compatibility reports, and pull requests are welcome.

If you test the project with a different legacy Outlook version, please include the Outlook version and Windows version in your issue.

License

MIT License. See LICENSE.