, You can also use CubexSoft OST to PST Converter Tool to convert and export Outlook Offline OST file to PST file format in Outlook 2021, 2019, 2016, and other versions. It is a very simple GUI, everyone can easily handle and manage the software without any problem. During the process, the software keeps all the folder structures without any changes and data loss. It supports various file formats such as PDF, MBOX, EML, MSG, DOC, RTF, TXT, Office 365, Gmail, G Suite, and many more. It was compatible with both Mac OS and Windows OS including Windows 11. Try the free demo version of the software without any cost.