If you want to migrate a few selected emails only that time you can use IMAP or drag and drop methods. But these methods are quite time consuming and may not work in huge number of messages. So I will suggest you to use an excellent Thunderbird to Outlook converter which is available free of cost for trial and export first 20 emails per folder for absolutely free. To check how to convert Thunderbird to outlook PST format, you can download the tool from above suggested source link.

Follow Steps to Perform Thunderbird Conversion to Outlook!

Install and launch the MailsDaddy Thunderbird to Outlook Converter. The tool will automatically fetch Thunderbird profiles and folders. You can also Browse Thunderbird profile/folder manually which you want to convert by clicking on Add File button.

The tool will scan selected MBOX files and preview its messages with all properties. Click on Export button.

Choose PST from Export option and finally click on the Export button to perform the migration process.

These steps will surely help to export Thunderbird email to Outlook 2016, 2013, 2010 and all later editions. But to remove demo version limitations, you need to get licensed edition of the tool which is available at affordable prices just on $39 only.

Get more details: http://www.mailsdaddy.com/thunderbird-to-outlook-converter/