Try a third party application which is equipped with fine and best features, the users can perform the recovery task by using OST to PST Converter. This application is made up by using the rich algorithm for the conversion task of OST to PST. This has a GUI that makes it easy to use for everyone. Before finishing conversion task it displays the preview of recovered mailbox along with all the data of OST file and converts them into new Outlook PST file format in a safe manner without any difficulty. It allows exporting selected data which you want to convert from OST to Outlook PST. You store your resultant file into PST, EMLX, EML, HTML, vCal, vCard, MBOX, and MSG file format.