You can use the CubexSoft MBOX to PST Converter tool to instantly convert MBOX files to PST in Outlook 2021, 2019, 2016, and others. This software allows you to bulk import MBOX emails to Outlook at once. During the process, the software keeps all the folder structures without any changes or data loss. It is a very simple and easy to use application. All professional and novice users can easily convert MBOX to PST without any help. It was compatible with both macOS and Windows. It supports all MBOX based email clients like Thunderbird, Apple Mail, Eudora, Entourage, and etc. You can also use the free demo version of the tool without any cost.