You can also convert Thunderbird to Outlook manually. But with many steps in this you will be able to convert only single mailbox at a time. After reading the steps given below, decide to do it or not.

Note 1:There is no guarantee of data security in this method so use the steps at your own risk.

Follow the steps below to transfer Thunderbird to Outlook manually

• Open your MS Outlook and click on File tab and then go to Open & Export option.
• Select Import/Export Tool option, a dialog box will pop-up.
• Select "Export to File" from the list and click "Next"
• Now again click on Outlook Data File (.pst) from the list and click on “Next” button.
• Select the folder you want to export and check the Subfolder option and then press Next.
• Save the destination for the .pst file and enable "Allow Duplicates" and then click "Finish Program".
• A dialog box will pop up asking you to add the password. This is an optional option so you can skip this step and click on OK button directly.

Once the job is done, your .pst file can be received at your destination point.

Note 2: It does not guarantee data security and even that is always prone to errors. Additionally, the native method is not a successful way to export Thunderbird to Outlook file.