To open OST files without Exchange Server, there is a variety of software available on the market. But we advise using this PassfixerOST Converter/Viewer Software to easily and securely access OST file data. Users can read/view OST file data, repair corrupt OST files, and convert OST into a variety of file formats using this multi-featured tool. Users of the software can quickly view all OST file data in the preview panel without using Outlook or Exchange environments. This tool supports OST files from all editions of Outlook and Exchange, including 2019, 2016, 2013, 2010, 2007, 2003, and earlier.