If the user want to export Thunderbird to Outlook then using the most suitable eSoftTools Thunderbird to PST Converter Tool, This tool simply export Thunderbird emails in PST file without losing any data. It can continue with all versions of MS Outlook 2019, 2016, 2013, 2010, 2007, and 2003. It can also allow exporting in multiple forms like- PST, EML, EMLX, YAHOO, OFFICE 365, GMAIL, MSG, AND HTML files.
For more info- https://www.esofttools.com/mozilla-thunderbird-to-pst-converter.html