Fix various issues like how to move OST to PST Outlook if your MS Outlook showing message cannot open OST file in Outlook? Free OST to Outlook PST Converter is developed basically for this purpose which not only leads simply to move an .ost in .pst but also perform the quick and flawless Conversion from OST to PST after recovery process. It has user friendly steps and executable on all Windows OS like Win8.1, Win 7(32-64 bit).