The professional Softaken Thunderbird to Outlook 365 Migration Tool to import Thunderbird files into Outlook 365 safely. Here, users can easily find and migrate selected Thunderbird file databases into the Exchange 365 platform. It is also compatible with quickly migrating Thunderbird files without hassle and size limitations. It’s compatible with perfectly importing unlimited sizes of Thunderbird emails into Outlook 365. The application allows users to view the complete Thunderbird file database before conversion. Here users can also upload Thunderbird emails into the O365 mailbox. Refer: https://www.softaken.com/guide/migrate-thunderbird-to-outlook-365-o365/