Download Backup Outlook 2016 OST file to Thunderbird with attachments. This software supports batch conversion option during conversion process. There is no file size limitation, so anyone can easily convert number of files at a time without any problem. It has very simple user friendly graphical interface, users can easily understand & use this software without any technical knowledge help. This software maintains all the folder structure during the whole conversion process without losing any data. This software supports all the MS Outlook editions & Windows editions.