If you don’t know how to repair corrupt OST files so I suggest you the eSoftTools OST Recovery Tool. It can recover all mailbox properties without making any change of data. It can convert OST files into many formats such as PST, EML, EMLX, HTML, Office 365, MSG, MBOX, etc with all internal email properties - to, cc, bcc, subject, attachment, and many others.
Read More:- Repair Corrupt Outlook OST Files
