For easier and effective conversion from Thunderbird to Outlook, use SysBud Thunderbird to Outlook Converter which makes your migration process more precise. The tool is so advanced that it can migrate multiple Thunderbird mailbox data at once and provide a single or different PST file as per user need. This single wizard application automatically loads the large mailbox into the application using the Autoload button but Thunderbird should be pre-installed in your local system. Thunderbird converter always migrates the emails or messages with equivalent attachments without losing inline images, text and rich formatting. The software quickly installed & runs on all Window edition such as Win 10, 8.1, 8, 7, XP (32bit&64 bit), etc and easily convert mailbox from Thunderbird to Outlook without any hassle. Try this astounding tool which provides also a free Demo version and using trial version you convert first 20 items from each folder.