I have an old Outlook OST file containing a large number of emails, and I need to convert the entire OST file into EML format so that I can open and use those emails in other email clients, such as Thunderbird or Windows Live Mail. Unfortunately, Outlook is not properly syncing, and I cannot directly export the emails. Can anyone guide me on a reliable method or tool to convert a complete OST file into EML files without losing attachments or formatting?