Kernel for OST to PST conversion tool even has the potential to repair corrupt/inaccessible OST files that may have gone damage due to innumerable reasons like virus attacks accidental deletion, abrupt system shutdown, Exchange Server crashes etc. The tool can even restore lost/permanently deleted emails from corrupt OST files, and then let you to migrate them to PST files and other formats like: MSG, EML, DBX, MBOX, TXT, RTF, HTML, and MHTML.