MailsDaddy MBOX to PST Converter tool is the best GUI tool is the best GUI tool to move data from MBOX-based email client to Outlook PST format. The solution keeps all mail and attachments in a new PST file. The software has various other conversion options like Office 365, EML, MSG, HTML etc. You can also use the free demo edition of the software and migrate 20 emails from each folder. Read more: https://www.mailsdaddy.com/mbox-to-pst-converter/