Yes, the PDS OST to PST Converter supports OST files created in older versions of Outlook. Whether the file was created in Outlook 2007, 2010, 2013, or later versions, the software can process and convert it into PST format without compatibility issues. It ensures that all mailbox data is preserved during the conversion process, regardless of the Outlook version used to create the OST file. This feature is especially helpful for users upgrading their systems or migrating data from legacy environments. The tool provides a seamless and reliable solution for handling old OST files.