An OST to PST Converter helps recover inaccessible Outlook data by extracting emails, contacts, calendars, and other mailbox items from corrupted or orphaned OST files. When Outlook cannot connect to the Exchange server, the OST file becomes unusable. In such cases, a converter tool scans the OST file and converts it into a PST file that can be easily opened in Outlook. This ensures data recovery without any loss and allows users to regain full access to their important emails and information.