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Teams app development for Microsoft 365 Copilot

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Teams app development for Microsoft 365 Copilot

How to build Teams apps that extend Microsoft 365 Copilot — the unified app model, message extensions, and agent extensions.

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/teams-app-development-for-copilot

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01

The unified manifest

The modern Teams app manifest (formerly called the Teams App manifest, now also referred to as Microsoft 365 app manifest) is a JSON document describing:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/teams-app-development-for-copilot

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02

Message extensions

The most useful starting point for many integrations:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/teams-app-development-for-copilot

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03

Building agent extensions

For richer AI-orchestrated experiences, build agent extensions via Copilot Studio:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/teams-app-development-for-copilot

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04

Tabs and personal apps

For embedded web experiences:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/teams-app-development-for-copilot

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05

Authentication

Apps use Microsoft Entra ID for auth. The Teams app SDK handles the authentication flow:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/teams-app-development-for-copilot

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06

Distribution

Once built, the app distributes via:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/teams-app-development-for-copilot

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07

When to build vs buy

For organisations considering custom app development:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/teams-app-development-for-copilot

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