After trying many methods I got the best solution to Convert Outlook OST to Windows Live Mail by using the amazing tool eSoftTools Software. It gives you the full output of OST file with accurate information without any loss. This tool offers to export all OST mailbox data into PST format with all email attachments, calendars, tasks, notes, etc. This tool also split the large PST file into the small PST folder. Users can find the select mail by using the advanced email filter option.