Search-based message extensions allow users to search an external system and share results through the compose message area of the Microsoft Teams client. You can now build and run your search-based message extensions in Teams, Outlook for Windows desktop and web experiences.

• NodeJS
• An M365 account. If you do not have M365 account, apply one from M365 developer program
• Set up your dev environment for extending Teams apps across Microsoft 365

Please note that after you enrolled your developer tenant in Office 365 Target Release, it may take couple days for the enrollment to take effect.

• Teams Toolkit Visual Studio Code Extension or TeamsFx CLI

1. From Visual Studio Code, open the command palette (Ctrl+Shift+P), type Teams: Create a new Teams app
2. Select Search-based message extension

Follow below instructions to get started with this application template for local debugging.

1. Press F5 or use the Run and Debug Activity Panel in Visual Studio Code.

2. Select a target Microsoft application where the message extension runs: Debug in Teams, Debug in Outlook and click the Run and Debug green arrow button.

3. If you select Debug in Outlook, follow the instructions in a Visual Studio Code pop-up dialog.

   

4. Click Install in Teams first and install the app in a Teams web client.

5. Click Configure Outlook to connect the bot with Outlook channel in the Bot Framework Portal.

6. Click Continue to continue to debug the app in Outlook.

1. Start debugging the project by executing the command teamsfx preview --local --m365-host <m365-host> in your project directory, where options for m365-host are teams or outlook.

2. If you select m365-host as outlook, follow the instructions in the command dialog.

3. Select Install in Teams first and install the app in a Teams web client.

4. Click Configure Outlook to connect the bot with Outlook channel in the Bot Framework Portal.

5. Click Continue to continue to debug the app in Outlook.

This template provides a simple functionality to search for npm packages and render the result in Adaptive Card.

• @mention Your message extension from the search box area.

• @mention your message extension from the compose message area.

• Click the ... under compose message area, find your message extension.

• Click the "More apps" icon under compose email area, find your message extension.

• Extend a Teams message extension across Microsoft 365
• Bot Framework Documentation
• Teams Toolkit Documentations
• Teams Toolkit CLI
• TeamsFx SDK
• Teams Toolkit Samples