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You can simply convert and export Thunderbird files into Outlook PST format by using trust-worthy ZOOK Thunderbird to Outlook Converter tool. The software provide hassle-free solution to export Thunderbird files into PST format along with mailbox data, attachments, contacts, notes, journals, etc. It is developed with highly advanced algorithm which makes it more safe and easy to use tool for converting multiple Thunderbird files to PST format in a single process.

For more info- https://www.zooksoftware.com/thunderbird-to-outlook/