OST to PST conversion software to restore ost file and transfer ost to pst file. Free Outlook ost to pst converter software is the master solution for recovery outlook ost file and also transfer ost file to pst file, Office 365 account, pst file, EML, EMLX, MSG, HTML, MHTML, MBOX, VCF, CSV, ICS, Live, Exchange Server, Zimbra, Gmail, Yahoo, and etc.