You can export a quote/order to a standalone .EQQ file in order to move it between EQ databases (either between different installations, even in different locations, or between different multi companies).
Export and import works the same regardless of quote or order status.
Note: An .EQQ file is only readable by EQ. If you want to export a quotation to e-mail for a customer to view, do not use this method, instead create a PDF file from the print menu.
Other options to export orders:
Create a PDF file of any document for customers to view
Export as a CSV file (to work on the product contents as a spreadsheet)