Reach hundreds of millions of customers and build rich scenariosMany millions of customers use Outlook calendar as part of an integrated hub that lets them effectively communicate and get things done. They can set up meetings, manage emails, find information about contacts and other users, and initiate conversations or online meetings all in one place, be it on the web, mobile, or desktop. Microsoft Graph not only connects apps to the calendar, mail, and contacts data of these customers, it enables apps to integrate with the best of Microsoft 365 and support a wide range of scenarios that enhance productivity and collaboration.Most features in the Outlook calendar API apply to calendars in personal Microsoft accounts and work or school accounts.** Denotes features below that are specifically applicable to Outlook calendars in only work or school accounts.