Exporting Outlook OST files to PST format becomes necessary when the Exchange server is inaccessible, the account has been deleted, or a data backup is required. Outlook's manual export option only works with active profiles, making it difficult to export orphaned or corrupted OST files. In such situations, eSoftTools OST to PST Converter Software is a reliable and secure solution. This tool deeply scans the OST file, converts it to PST format, and exports emails, attachments, contacts, calendars, and notes without any data loss. The software maintains the original folder hierarchy and email properties and also handles large-sized OST files smoothly.