If you want to export Thunderbird to Outlook, then you can free download and install the eSoftTools Thunderbird to Outlook converter software. It can provide the best facilities to convert Thunderbird mbox to PST files without wasting any data. It can preserve email formatting, bcc, cc, from, dates, email headers, and attachments during conversions. Folder structures can’t change during conversion. It can provide a free demo pack to change the first 25 details of Thunderbird in the PST file.
For more info- https://www.esofttools.com/thunderbird-to-outlook-converter.html