MailsDaddy MBOX Converter tool is used to convert MBOX file to PST file format at once. This single GUI application has several features like preview, batch migration, email filter, etc. The software maintains the folder structure in the resultant PST file. You can also start with the free demo edition and open up to 20 emails from each folder.
Read more: https://www.mailsdaddy.com/mbox-to-pst-converter/