There is an easy way to convert from Mozilla Thunderbird to Microsoft Outlook without data loss by using the WholeClear Thunderbird to PST Converter. You don’t need to know anything about technology. After you install the tool and load your Thunderbird emails, it only takes a few clicks to change them to PST file. You can safely bring all of your emails, files, folders, and contacts with you. There is nothing left over. You can move thousands of emails at once with this tool because it works on all versions of Windows and can convert a lot of emails at once. No loss of files. Stress-free. It was easy and clean to switch from Thunderbird to Outlook.