URL    = "https://b24-ar17wx.bitrix24.by/rest/1/ps5...";
    FileID = "21696";

    Result = OPI_Bitrix24.GetFileExternalLink(URL, FileID);

    URL   = "b24-ar17wx.bitrix24.by";
    Token = "a8e65667006e9f06006b12e400000001000...";

    Result = OPI_Bitrix24.GetFileExternalLink(URL, FileID, Token);