This method can be used to upload ad hoc invoices. This method creates ad hoc invoices without a period and is available for backwards compatibility. To create an ad hoc invoice with a period, use the UploadInvoices2 method instead.
True if success, false along with error information otherwise.
| || ||A list of invoice objects to upload.|
| || ||Additional information when operation failed.|
| || ||Whether the operation completed successfully.|
| || ||Operation result.|