Welcome to the user guide for Regain OST to PST Converter software, the most efficient and user-friendly, easy-to-use, interactive email conversion tool that helps converting emails and other items of Outlook Storage Table (OST) files to Outlook PST files. Apart from saving OST file data in PST file format, the tool also supports saving OST file data in EML, EMLX, MSG, PDF, MBOX, vCard, HTML, TGZ and ICS file formats.