The DataVare OST to EML Converter is locked out of your Outlook OST file Do you need to access emails from an old Exchange account, an orphaned file or migrate data to a new email client like Thunderbird, Mac Mail or Windows Live Mail. Find a solution that helps you safely extract all mailbox items—including emails, attachments, contacts, calendars, tasks and notes—and convert them into the universal EML format. The software ability to convert large OST files without data loss. You can extract emails, attachments, folders, and details without Outlook or an Exchange connection. The tool keeps your original structure intact, works with any size OST, and opens the data in all major email clients that support EML. It’s a quick, safe way to regain access to important messages when Outlook stops cooperating. The application support for OST files from various MS Outlook versions and compatibility with different operating systems.