public static async Task SendReply(string AccessToken, string groupid, string channelid, string messageid, string value) { var httpClient = new HttpClient(); var apiCaller = new ProtectedApiCallHelper(httpClient); var url = $"https://graph.microsoft.com/beta/teams/{groupid}/channels/{channelid}/messages/{messageid}/replies"; createmessages createmailmessagedetails = new createmessages(); messagebody body = new messagebody(); body.contentType = "html"; body.content = value; createmailmessagedetails.body = body; string data = JsonConvert.SerializeObject(createmailmessagedetails); JObject createmailmessage = await apiCaller.CallPostWebApiAndProcessResultASync(url, AccessToken, data); }