I have an old Outlook OST file that contains several important emails I need to access. Unfortunately, I no longer have access to the Exchange server, and I want to convert this OST file into EML format so I can open the emails individually in other email clients like Thunderbird or Windows Mail. I tried renaming and extracting data manually, but that did not work. Can someone please guide me on the best and most reliable way to convert OST files to EML format without losing any email data, attachments, or formatting?