If you want to export an OST file from Microsoft Outlook to PST, a direct export option isn't available, especially if the OST file is orphaned or inaccessible. In this situation, eSoftTools OST to PST Converter is an effective solution. This software scans the OST file and safely converts emails, contacts, calendar, notes, and attachments to PST format. The converted PST file can be easily imported into Outlook, allowing access to all data without any data loss.