To quickly export MBOX files to Outlook PST file format, including all emails, and other data as well as attachments, try the export MBOX to PST application. With Outlook not required, you can use it to export certain MBOX files to Outlook PST files. It worked with all recent and older Windows OS versions. Every MS Outlook version is supported by this application. Download the application's free demo version. Refer: https://www.sametools.com/convert/mbox/