I recommend using a professional Advik MBOX to PST Converter. This tool offers conversion of MBOX files into PST, EML, MSG, HTML, and other formats, along with options to migrate emails to Gmail, Yahoo, Thunderbird, and other clients. You can easily convert MBOX to PST with all email details like cc, bb, subject, signature, etc., without any data alteration, as there are no size limitations. The software also allows you to set a custom folder name for the resulting file. It’s very reliable and has a simple GUI, making it easy to use even for beginners.