How to produce a PDF/A document

Microsoft Office : From the "Save As" menu item, change the default format by selecting the PDF format (*.pdf). To make sure that the selected format is PDF/A, click on the "Options" button and make sure that "PDF/A compliant" is selected. This function is available only in Windows (not MacOS) versions of the operating system.

Open Office : from the "File" menu item click on "Export to PDF". In the PDF Options dialog box select the "PDF/A-1" item and then click on "Export".

For other options on how to create a PDF/A see the guide under this link (Italian only).