Dynamics GP Web服务未设置Front Office集成ID

Question

我正在使用Dynamics Great Plains网络服务，并遇到正在设置Front Office Integration ID的问题。

SalesOrderLine so_line = new SalesOrderLine();

            so_line.PriceLevelKey = new PriceLevelKey() { CompanyKey = proxy.CompanyKey, Id = "4" };
            so_line.UnitPrice = new MoneyAmount() { Value = 12.49M };
            so_line.Quantity = new Quantity() { Value = 1 };
            so_line.Discount = new MoneyPercentChoice() { Item = new MoneyAmount() { Value = 1.25M } };
            so_line.FrontOfficeIntegrationId = "802L0000000X1RNIA0";

            so_line.ItemKey = new ItemKey() { CompanyKey = proxy.CompanyKey, Id = "HAAL" };
            so_line.UofM = "EACH";
            so_line.RequestedShipDate = DateTime.Parse("2/26/2018");

有关为什么这个802字符串不会保存到createSalesOrder方法行上的任何想法？