You must obtain How do I switch from Thunderbird to Outlook? Simply download the SysInspire Thunderbird to Outlook converter software, and you're done. It has incredible features to convert Thunderbird profile email in PST file without harming any Thunderbird MBOX data, and it has two methods to distinguish the area of Thunderbird MBOX file for conversion, which is 1. Thunderbird Profile Autoload 2. Select a Thunderbird file on your own. Because the converted PST file from Thunderbird is in Unicode format, it can be opened in all versions of MS Outlook 2019, 2016, 2013, 2010, 2007, and 2003.