Thunderbird Backup Tool is a full-fledged utility that saves your Thunderbird mailbox to PST, PDF, EML, EMLX, MSG, CSV, TIFF, JPG, HTML, etc. It also safely migrate MBOX files to several email client like Gmail, Yahoo Mail, HotMail, Office 365, IMAP, Zoho Mail, etc. They will remove the duplicate emails feature that protects your mailbox and saves your space from backing up in the identical email. Additionally, it supports all versions of the Windows operating system. To explore the performance you can download it.
However, if you want to convert Thunderbird to Outlook 365 then here is the best article for you to Migrate From Thunderbird To Outlook 365. They will provide the most secure manual methods to migrate the process.
