If you're not sure how to use the eSoftTools OST to PST Converter Software program to fix the Outlook OST file missing problem. This is the entire anti-virus package for recovering OST files. The data in corrupted or damaged OST files can be readily restored. This software has no file size restriction; you can choose multiple files at once and convert them into PST, HTML, MBOX, EML, EMLX, Yahoo, Gmail, Office 365, and vCard formats. You can also view a live preview of the contents of OST files, such as contacts, calendars, journals, appointments, and so on, while the conversion is happening.

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