URL       = "https://b24-ar17wx.bitrix24.by/rest/1/h0m...";
    MessageID = "3850";

    Result = OPI_Bitrix24.DeleteMessage(URL, MessageID);

    URL       = "b24-ar17wx.bitrix24.by";
    Token     = "28e6ff67006e9f06006b12e400000001000...";
    MessageID = "4286";

    Result = OPI_Bitrix24.DeleteMessage(URL, MessageID, Token);