Try this amazing CubexSoft OST to PST Converter tool to directly import and export Outlook offline OST file to PST file format. It allows you to bulk move OST file to PST including all emails, contacts, calendars, and other items without Outlook. It has a very simple GUI, everyone can easily use and manage the software without having any skills and help. There is no need to install MS Outlook application for the conversion process. During the process, the app keeps all the folder structures without any changes and data loss. It was compatible with both Mac OS and Windows OS including Windows 11. Try this free demo version of the program without any cost.
Read More – https://www.cubexsoft.com/ost/pst.html