Try outlook ost file converter tool to fix ost file and also restore ost to pst file. by using its tool you can convert outlook ost to pst files or multiple formats such as , Office 365 account, pst file, EML, EMLX, MSG, HTML, MHTML, MBOX, VCF, CSV, ICS, Live, Exchange Server, Zimbra, Gmail, Yahoo, and etc. without wasting too much time.
