Currently, when you open an existing Excel file in the Kendo UI spreadsheet, make some changes, then post the changes back to the web server, the print and scaling settings of the original Excel file would be lost.
The Kendo.ooxml.Workbook should preserve those settings.
From Ticket ID 1513253
Message from Aleksandar
Calling the saveAsExcel() method triggers the excelExport event. The Kendo UI Spreadsheet utilizes the Excel export module framework to produce Excel files directly in the browser. The output files are in the OOXML Spreadsheet format with an .xlsx extension as explained here. Setting the forceProxy configuration to true will send the ooxml generated export file to the remote endpoint. However, the kendo.ooxml.Workbook API does not expose a configuration option that would preserve the option for setting the page scaling when printing, thus the configuration is lost. If you would like to see such an option available I can suggest logging a Feature Request in our Feedback Portal.