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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

Microsoft Outlook Add-ins updates - REST decommission, shared folder support, and item multi-select

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Outlook add-in: Make an Exchange Web Service request from Outlook

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Office Add-ins community call – July 2022

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Use Outlook event-based activation to set the signature

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Outlook add-ins developer community

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