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Office add-ins development overview

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Office add-ins development overview

The modern Office add-in model — web-based extensions for Word, Excel, PowerPoint, Outlook running across platforms.

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/office-add-ins-development

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01

The model

An Office add-in is fundamentally a web app that runs in a sandboxed iframe inside the Office app:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/office-add-ins-development

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02

What add-ins can do

Depending on the host app:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/office-add-ins-development

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03

Distribution

Add-ins can be distributed via:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/office-add-ins-development

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04

What's coming

The strategic direction is the unified app model: one manifest, one codebase, deployed once, runs in Teams, Outlook, Word, Excel, PowerPoint, and Microsoft 365 Copilot. Microsoft has been progressively converging the pr…

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/office-add-ins-development

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