The lack of a common method for exporting Thunderbird data to PST is one of the biggest obstacles in the way of your conversion process. This makes the process harder than it is, even for the most experienced users. The problem further amplifies when the email clients involved in the conversion process work on different file formats, which is exactly the case with Thunderbird and Windows Outlook. Exporting Thunderbird to PST amidst file format conflicts Thunderbird makes use of the more common MBOX format for storing the data of its users. Windows Outlook uses the PST formats for doing the same. The problem with these file formats is that Outlook isn’t compatible with any file format other than PST. Therefore, you need to convert everything present in your MBOX format to PST , to get it all in your Outlook account. This is not as easy as it sounds. It is not like changing the extension of a file. No. It involves layered and structure conversion of all the data whilst ensurin...