Numerous reasons, like virus attack, malfunctioning or hardware failure, unexpected system shutdown, accidental deletion of Exchange server, occurrence of CRC errors while copying OST file, etc. are the leading causes of OST file corruption. However, whatever be the reason for OST file error, with RecoveryFix for OST, you can flawlessly recover the OST data items like contacts, calendar, journals, notes, tasks, emails, or sent items, etc.