Short description of Convert OST 7.05.01: Convert OST is a email recovery program for Microsoft Exchange Offline Storage Files. In case of server crash or deleting a mailbox Convert OST quickly converts .ost file to MS Outlook Personal Storage File (.pst) format. Convert OST, Exchange ost email recovery tool can easily recover and restore all your important emails, contacts, calendar, tasks etc from an orphaned Outlook OST file to a PST file, helping you to restore your crucial data.