You can also use an amazing OST to PST file converter tool. It supports all corrupted or damaged OST files and convert them into PST file without losing any data. It repairs all data items of OST files such as email messages, calendar, contacts, journals, tasks, etc. The solution makes user enable to save converted OST file into some other email file format like RTF, HTML, PST, MSG and EML.
Read more and download free demo version here:- http://migrateemails.com/convert-ost-to-pst-format/