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Build powerful Outlook apps using one set of APIs

Reach hundreds of millions of users across web, Windows, Mac, and mobile.

Interactive emails

Learn how Adaptive Cards can increase productivity by allowing users to take quick actions from within their Inbox.

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Extend Outlook

Help users get more done with add-ins. Launch your custom app as a taskpane, contextual card, or a simple button on the ribbon.

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Connect to Outlook

Bring Outlook-related data & features for Office 365 & Outlook.com users into your app using the Microsoft Graph REST API.

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What's new in Outlook development

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