Outlook API Reference

The Outlook REST APIs are a part of the Microsoft Graph. Microsoft recommends using the Microsoft Graph to access Outlook mail, calendar, and contacts. You should use the Outlook API endpoints directly (via https://outlook.office.com/api) only if you require a feature that is not available on the Graph endpoints. For more information on the differences between Graph and the Outlook endpoints, see Compare the Microsoft Graph and Outlook endpoints.

Released APIs

The following APIs are released and ready for production use in both the Graph and Outlook endpoints.

Transitioning APIs

The following APIs are released and ready for production in the Outlook endpoint, but are in preview status in the Graph endpoint.

Beta APIs

The following APIs are in beta and should not be used in production.

APIs only available in Outlook endpoint

The following APIs are only available on the Outlook API endpoint.

Released

Beta