InQuit OST to PST converter Software supports all MS Outlook Versions (97 up to 2019) and Windows Supported Tool. It is 100% secure for repairing, recovering and converting the offline OST files to PST Outlook file. MS Outlook is not required for using the software to conversion purpose. By using this it is possible to convert multiple large OST file to PST without any change or losing data. You can also export encrypted and password protected files into several interesting file formats like PST, MSG, EML, vCal, EMLX, vCard, MBOX, HTML, etc.