If you are searching to convert Thunderbird to Outlook 365 then you will go with this informative article Migrate From Thunderbird To Outlook 365. This article will provide the most efficient and effective manual ways to accomplish the process. However, the manual method is soo time-consuming. So Additionally, they will also provide the professional solution Thunderbird Backup Tool. The software is a full-fledged utility that saves your Thunderbird mailbox to PST, PDF, EML, EMLX, MSG, CSV, JPG, HTML, etc. It also offers to migrate Thunderbird emails to several email clients like Gmail, Yahoo Mail, IMAP, Hotmail, iCloud, Zoho Mail, Office 365, AOL, etc. You can download the free demo version of the software to analyze the performance.