Professional applications like MailsDaddy MBOX to PST Converter Tool is the best GUI solution that helps all levels of users migrate MBOX files to Outlook PST format. The software supports all MBOX-based email clients like Gmail, Webmail, Thunderbird, Netscape, Apple Mail, Entourage etc., and allows users to move mailboxes in PST files.
Plus, it also migrates data from MBOX file to Office 365 and Live Exchange mailbox with all attachments. The free demo edition of the software moves 20 emails from each folder.
For more info: https://www.mailsdaddy.com/mbox-to-pst-converter/