There are lots ofrecovery tool but I would like to suggest
InQuit OST to PST Recovery Program
that easily repair the damaged file and re-access the data with ease. This also
scan the data and confirm that there is no virus on your file. With this , youcan easily migrate the data from OST to PST. The GUI of the application isadvanced that make it easy to use for everyone.You can alsomigrate your password protected file without any trouble. During the conversion process, it also keep the data integrity. Apart from this, it provide an accurate result that help to export the data without any fear. Before the conversion see the preview of the data and check all is well. There is no needto install MS Outlook on your system, because it can work in the absence of MS Outlook that is the best thing. You can also migrate single as well as more
than single file included with email, notes, contact, attachment, task and many more. You will be ableto migrate the data into many file formats such as PST, EMLX, MSG, vCal, vCard,MBOX and HTML file formats. Apart from this, you can export the data into cloud-based application Office365 & Live Exchange Server.
Read More: https://www.inquitsoftware.com/en/ost-to?-pst-converter.html