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I am trying to proactively send an adhoc message from my Azure hosted bot to a Microsoft Teams team chat. I have been successful in sending a message to a 1 on 1 chat a user has with a bot.

I have seen this documentation detailing how to do so, however I believe this is Bot Framework version 3. It uses the nugget package Microsoft.Bot.Connector.Teams.Models, which is no longer supported in version 4. I have not been able to find documentation for doing this.

To be a little more descriptive:

I have a bot that recieves POST requests from my web app with alarm data. When the bot receives one of these POST requests it forwards a message to a team chat. This this message will be sent outside any context. My code for forwarding to a 1 on 1 chat can be found here.

/// <summary>

    /// Forwards a message to a personal chat.

    /// The details of who to send the message to is included in the <paramref name="forwardContext"/>.

    /// </summary>

    /// <param name="forwardContext">JSON of the recipient details.</param>

    /// <param name="messageToSend">Text message to send to chat.</param>

    /// <returns>A <see cref="Task"/> representing the asynchronous messsage forward.</returns>

    private async Task ForwardMessageToPersonalChatAsync(JToken forwardContext, string messageToSend)

    {

        // Collect data from JSON input

        var restCmd = forwardContext;

        var toId = (string)restCmd["toId"];

        var toName = (string)restCmd["toName"];

        var fromId = (string)restCmd["fromId"];

        var fromName = (string)restCmd["fromName"];

        var channelId = (string)restCmd["channel"];

        var serviceURL = (string)restCmd["serviceURL"];

        var conversationId = (string)restCmd["conversation"];

        var tenant = (string)restCmd["tenant"];

        var cred_str = $@"toId: {toId}

        toName: {toName}

        fromId: {fromId}

        fromName: {fromName}

        channelId: {channelId}

        serviceURL: {serviceURL}

        conversationId: {conversationId}";

        this.logger.LogInformation(cred_str);

        this.logger.LogInformation($"Forwarding the following message to {toName}: {messageToSend}");



        var uri = new System.Uri(serviceURL);



        Dictionary<string, string> botCreds = this.GetBotCredentials();

        ConnectorClient connector = new ConnectorClient(uri, botCreds["App ID"], botCreds["App Password"]);

        var activity = new Activity

        {

            Type = ActivityTypes.Message,

            From = new ChannelAccount(fromId, fromName),

            Recipient = new ChannelAccount(toId, toName),

            Conversation = new ConversationAccount(false, "personal", conversationId),

            Text = messageToSend,

        };



        try

        {

            MicrosoftAppCredentials.TrustServiceUrl(serviceURL);

            await connector.Conversations.SendToConversationAsync(conversationId, activity);

        }

        catch (System.Exception ex)

        {

            this.logger.LogError(ex.ToString());

        }

    }

How can I send a proactive message to a Team chat?

Thanks for any help.

Teams does not yet officially support Bot Framework 4.0.