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Connect Microsoft Outlook to Claude Cowork

Give Claude Cowork governed access to Microsoft Outlook’s 37 tools through Runlayer, with identity, policy, scanning, and audit on every call.

Book a demo Claude Cowork setup guide

Set up

Add Microsoft Outlook to Claude Cowork in four steps

Admins approve the server once. Everyone in Claude Cowork then gets it through the same governed connection.

  1. 1

    Approve Microsoft Outlook in Runlayer

    Add Microsoft Outlook from the catalog and choose who can use it and which of its tools are allowed.

  2. 2

    Connect Claude Cowork to Runlayer

    Claude Cowork gets connector tools through the Runlayer Plugin. With direct tool listing turned on for your deployment, Microsoft Outlook’s 37 tools show up in Claude Cowork’s own tool list.

    Claude Cowork setup guide
  3. 3

    Sign in to Microsoft Outlook

    Sign in the way Microsoft Outlook requires. Runlayer holds the credentials so they stay out of the client’s configuration.

  4. 4

    Use Microsoft Outlook from Claude Cowork

    Microsoft Outlook’s approved tools appear in Claude Cowork. Every call is checked against policy and recorded.

Tools

37 Microsoft Outlook tools in Claude Cowork

Runlayer policy decides which of these Claude Cowork users can call. 6 read data only and 2 can change or delete data.

  • Create draft

    Create a new Outlook draft message in the Drafts folder without sending it.

  • Create reply draft

    Create an editable Reply or Reply-All draft attached to an existing Outlook thread.

  • Delete attachment

    Delete an attachment from an Outlook message or draft.

  • Delete message

    Delete a message from an Outlook mailbox.

  • Download attachment

    Download the content of a specific attachment from an Outlook message.

  • Forward message

    Forward an existing Outlook message to one or more recipients.

  • Get attachments

    List all attachments on an Outlook message, returning metadata but not file content.

  • Get message

    Fetch the full content of a single Outlook message by id, headers and body included.

See all 37 Microsoft Outlook tools

Control

What Runlayer can see and stop in Claude Cowork

Some controls apply to every client at the gateway. Others depend on what Claude Cowork exposes to Runlayer.

  • Gateway policy (available)

    Every Microsoft Outlook call from Claude Cowork passes through Runlayer, where your policies can allow, alert, mask, or block it.

  • Audit trail (available)

    Each call is recorded with the user, Claude Cowork as the client, the tool, and the policy and scanner decisions.

  • Anthropic inference hooks (available)

    Anthropic Inference hooks let Runlayer check Claude Cowork prompts before inference.

  • OTLP telemetry (available)

    Claude Cowork can send supported OpenTelemetry events to Runlayer for observe-only session visibility.

  • Stop a call before it runs (available)

    Runlayer can reject a Claude Cowork prompt before Anthropic runs it, which stops the whole request rather than one tool call.

  • Block output after it runs (available)

    Because Runlayer checks the full prompt, tool results in it can be blocked before the model sees them.

  • Redact output in place (not available)

    Runlayer cannot mask content in Claude Cowork. The gateway still applies policy to the call.

In Claude Cowork

  • Cowork session data sent over OpenTelemetry is for monitoring only and cannot stop anything.

Frequently asked questions

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