This sample demonstrates a Teams tab where users can input Incoming Webhook URLs and send message cards to a specified Teams channel, illustrating the HttpPOST action for interactive message cards. It includes setup steps for running the sample, testing in multiple environments such as Outlook and Office, and provides insights into webhooks and connectors for extending Microsoft 365 apps.

• Tabs
• Incoming Webhooks

1. Register a new application in the Microsoft Entra ID – App Registrations portal.
2. Select New Registration and on the register an application page, set following values:
   • Set name to your app name.
   • Choose the supported account types (any account type will work)
   • Leave Redirect URI empty.
   • Choose Register.
3. On the overview page, copy and save the Application (client) ID, Directory (tenant) ID. You'll need those later when updating your Teams application manifest and in the appsettings.json.
4. Navigate to API Permissions, and make sure to add the follow permissions: Select Add a permission
   • Select Add a permission
   • Select Microsoft Graph -> Delegated permissions.
   • User.Read (enabled by default)
   • Click on Add permissions. Please make sure to grant the admin consent for the required permissions.

• .NET Core SDK version 6.0

  # determine dotnet version
  dotnet --version

• Publicly addressable https url or tunnel such as dev tunnel or ngrok latest version or Tunnel Relay

• Teams Microsoft Teams is installed and you have an account

• Microsoft 365 Agents Toolkit for Visual Studio

The simplest way to run this sample in Teams is to use Microsoft 365 Agents Toolkit for Visual Studio.

1. Install Visual Studio 2022 Version 17.14 or higher Visual Studio
2. Install Microsoft 365 Agents Toolkit for Visual Studio Microsoft 365 Agents Toolkit extension
3. In the debug dropdown menu of Visual Studio, select Dev Tunnels > Create A Tunnel (set authentication type to Public) or select an existing public dev tunnel.
4. In the debug dropdown menu of Visual Studio, select default startup project > Microsoft Teams (browser)
5. Right-click the 'M365Agent' project in Solution Explorer and select Microsoft 365 Agents Toolkit > Select Microsoft 365 Account
6. Sign in to Microsoft 365 Agents Toolkit with a Microsoft 365 work or school account
7. Set Startup Item as Microsoft Teams (browser).
8. Press F5, or select Debug > Start Debugging menu in Visual Studio to start your app
   
9. In the opened web browser, select Add button to install the app in Teams

If you do not have permission to upload custom apps (uploading), Microsoft 365 Agents Toolkit will recommend creating and using a Microsoft 365 Developer Program account - a free program to get your own dev environment sandbox that includes Teams.

1. Create a incoming webhook. Create incoming webhooks. Keep this webhook URL handy while running the sample.

1. Run ngrok - point to port 3978

   ngrok http 3978 --host-header="localhost:3978"

   Alternatively, you can also use the dev tunnels. Please follow Create and host a dev tunnel and host the tunnel with anonymous user access command as shown below:

   devtunnel host -p 3978 --allow-anonymous

1. Clone the repository

   git clone https://github.com/OfficeDev/Microsoft-Teams-Samples.git

2. In a terminal, navigate to samples/TeamsJS/incoming-webhook/csharp/ClientApp

   npm install

   If you face any dependency error while installing node modules, try using below command

   npm install --legacy-peer-deps

3. In a terminal, navigate to samples/TeamsJS/incoming-webhook/csharp

   # change into project folder
   cd # IncomingWebhook

4. Run the app from a terminal or from Visual Studio, choose option A or B.

A) From a terminal

# run the app
dotnet run

B) Or from Visual Studio

• Launch Visual Studio
• File -> Open -> Project/Solution
• Navigate to IncomingWebhook folder
• Select IncomingWebhook.csproj file
• Press F5 to run the project

1. This step is specific to Teams.
   • Edit the manifest.json contained in the appPackage folder to replace {{Manifest-id}} with any GUID ID.
   • Edit the manifest.json for contentUrl, websiteUrl inside staticTabs section. Replace <<Domain-name>> with app's base Url domain. E.g. if you are using ngrok it would be https://1234.ngrok-free.app then your domain-name will be 1234.ngrok-free.app and if you are using dev tunnels then your domain will be like: 12345.devtunnels.ms.
   • Note: If you want to test your app across multi hub like: Outlook/Office.com, please update the manifest.json in the incoming-webhook\csharp\IncomingWebhook\Manifest_Hub folder with the required values.
   • Zip up the contents of the appPackage folder to create a Manifest.zip or Manifest_Hub folder to create a Manifest_Hub.zip(Make sure that zip file does not contains any subfolder otherwise you will get error while uploading your .zip package)
   • Upload the manifest.zip to Teams (In Teams Apps/Manage your apps click "Upload an app". Browse to and Open the .zip file. At the next dialog, click the Add button.)
   • Add the app to personal scope.

• Open Incoming webhook tab.

• Click on send button. You will get a card from webhook in the team where incoming webhook is added.

• To view your app in Outlook on the web.

• Go to Outlook on the weband sign in using your dev tenant account.

On the side bar, select More Apps. Your uploaded app title appears among your installed apps

Select your app icon to launch and preview your app running in Outlook on the web

Note: Similarly, you can test your application in the Outlook desktop app as well.

• To preview your app running in Office on the web.

• Log into office.com with test tenant credentials

Select the Apps icon on the side bar. Your uploaded app title appears among your installed apps

Select your app icon to launch your app in Office on the web

Note: Similarly, you can test your application in the Office 365 desktop app as well.

• Build webhooks and connectors
• Extend Teams apps across Microsoft 365