Import mails to Microsoft Office Outlook.
This is a VSTO add-in. (Built on net472)
Download the latest Setup_OutlookIMExToolsAddIn1.exe from Releases
Install Setup_OutlookIMExToolsAddIn1.exe and also VSTO add-in.
Launch Microsoft Office Outlook.
Open IMEx Tools tab.
Click Import from Thunderbird button.
Click Select profile or... button to pick up a Thunderbird profile folder.
And also check the location of Import to this Outlook folder.
Clicking Import will begin import process.
Fortunately it is Import suceeded! in this case.
The mails will be imported.