Hello! If you need to transfer your emails efficiently and securely, then my friend advises the site
https://www.outlooktransfer.com/products/thunderbird-to-outlook-transfer/. This is Thunderbird to Outlook Transfer app solves your Thunderbird to Outlook mailbox conversion task. The process is automatic, so you don't need to worry about versions, mailbox formats, settings and so forth. I hope this information was helpful to you.