You can also use the professional CubexSoft MBOX to PST Converter software to bulk export multiple MBOX files to the Outlook PST file format with attachments. It has a very simple and easy-to-use application. This software supports various saving options like MBOX to PST, PDF, EML, EMLX, OLM, HTML, RTF, PNG, Thunderbird, Office 365, Gmail, and many more. There is no file size limitation; one can export a large number of MBOX files into Outlook PST format. It also supports all MBOX-supported email clients like Thunderbird, Apple Mail, Eudora, Entourage, etc. It was compatible with both macOS and Windows OS, including Windows 11. You can also use the free demo version of the tool without any cost.