If you are required to migrate Thunderbird to outlook 365, then using the most famous software eSoftTools Thunderbird to Outlook Converter, I can convert single or multiple thunderbird files to Outlook pst. This tool auto-detects configured Thunderbird profile from its location for migration. This software preserves all email properties and Original data structure during the conversion process. It works with all new and old versions of MS outlook.
Read More:- Migrate Thunderbird to Outlook 365