Although it involves several steps and some technical work, you can convert MBOX to PST manually. To begin, import your MBOX files into Apple Mail or Thunderbird and set up a Gmail account. Enable IMAP and sync the emails with Microsoft Outlook after they are visible in the Gmail account. Your MBOX files' emails will be available in Outlook once they have synchronized. Outlook's "Import/Export" feature can then be used to export the mailbox contents into a PST file. Although this procedure is effective, it can be time-consuming, and if not performed carefully, it could result in partial data loss.

Try BLR MBOX Converter for a more dependable and efficient process. This tool saves time and ensures perfect accuracy by directly converting MBOX files into PST format while maintaining email attributes, attachments, and folder hierarchy. If you want accuracy and efficiency, this is your best bet.