Use a third party software Thunderbird to Office 365 Converter to perform Thunderbird account transfer to Office 365 in accurate folder structure and folder hierarchy. The software just need login details of Office 365 admin account to perform Thunderbird account transfer to Office 365. It has user friendly graphical interface which makes it easy to be operated by anyone. The tool offers various advance filters such as to, from, subject, date etc. to accomplish Thunderbird account transfer to Office 365. Download Thunderbird to Office 365 Converter demo version to transfer first 20 Thunderbird emails to Office 365 for free of cost.