OST recovery tool to convert OST to PST from Exchange Server when goes down due to any reasons. Exchange OST converter program can safely OST convert into PST Outlook and save all emails, calendars, journals, attachments, appointments, delete item, receive item etc. Download demo version software of OST to Outlook from our corporate website. http://www.ost2pst.us/. Software is compatible with all Windows Operating Systems and MS Outlook versions.