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    Start building secure, intelligent solutions with Office 365 today.

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    Extend Office 365 with Office Add-ins

    Discover how to extend Office applications across platforms using Office Add-ins.

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    Build smarter productivity apps

    Use the Microsoft Graph API to connect to the data that drives productivity - mail, calendar, documents, directory, devices, and more.

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    Submit your solution to AppSource

    Publish your Office Add-in, SharePoint Add-in, Microsoft Teams app, or Power BI custom visual in AppSource (formerly Office Store) and make it available within Office products.