To convert MBOX to PST, the easiest method is to use a dedicated MBOX to PST Converter such as
MailsDaddy MBOX to PST Converter. Simply add your MBOX file or folder, preview the mailbox data, select the required emails or folders, and choose PST as the export format. The tool supports batch conversion and preserves email content, attachments, folder hierarchy, formatting, and metadata during the process. Once the conversion is complete, the resulting PST file can be opened or imported into Microsoft Outlook. This approach is especially useful when migrating multiple MBOX files from email clients such as Thunderbird or Apple Mail to Outlook without going through complicated manual steps.