How can I get my bot to post a message to a Microsoft Teams channel?

Microsoft 365 & Office Microsoft Teams
,
1

How can I get my bot to post a message to a Microsoft Teams channel?

2

For anyone who is wondering about the same for c#, here is the solution that worked for me:

    var channelData = context.Activity.GetChannelData<TeamsChannelData>();
    var message = Activity.CreateMessageActivity();
    message.Text = "Hello World";

    var conversationParameters = new ConversationParameters
    {
         IsGroup = true,
         ChannelData = new TeamsChannelData
          {
             Channel = new ChannelInfo(channelData.Channel.Id),
         },
         Activity = (Activity) message
    };

    var connectorClient = new ConnectorClient(new Uri(activity.ServiceUrl));
    var response = await 
    connectorClient.Conversations.CreateConversationAsync(conversationParameters);

Note: If you are calling this outside Bot’s controller code then you need to call TrustServiceUrl on serviceUrl as shown here:

    MicrosoftAppCredentials.TrustServiceUrl(serviceUrl, DateTime.MaxValue);
    var connectorClient = new ConnectorClient(new Uri(serviceUrl));

Source of answer: https://github.com/OfficeDev/BotBuilder-MicrosoftTeams/issues/162