The majority of users switch to Outlook Mail to Thunderbird (TBird) due to the fact that Thunderbird is an open-source email client (free at no cost) that is that is compatible to Windows, Mac OS, Linux. But, they face some issues when they import Outlook in Thunderbird Local Folders, such as inaccessible characters, folders that are not present and are unable to locate a the correct steps to follow when in importing Outlook Profile into Thunderbird out of Outlook 2019 and 2016 editions. 2013 and later editions.