It's not possible to open an OST file directly in Outlook, especially if the OST file is orphaned, inaccessible, or corrupted. In such cases, eSoftTools OST to PST Converter Software is the best solution. This tool scans the OST file, recovers all its data, and converts it into PST format, which Outlook can easily open. The software exports emails, attachments, contacts, and calendars, preserving the original folder structure. Thanks to its user-friendly interface, even users without technical knowledge can open and access their OST files in Outlook.