With the help of
eSoftTools OST to PST Converter Program, you can easily
export OST files to PST Outlook. This tool does not require the installation of MS Outlook to recover and export OST file data. You can quickly export an OST file to a variety of formats, including PST, EML, MSG, and MBOX. This application works with all Outlook file versions, including 2000, 2003, 2007, 2010, 2013, 2016, and 2019. Before exporting the OST file, the user can see a smart preview window. You may also try out the software's demo version, which only exports a few things from each folder.
Get more info- OST to PST Converter