If you need to convert Thunderbird to Outlook then, I would like to recommend using the eSoftTools MBOX converter tool that efficiently converts MBOX over 25 other email clients such as Apple mails, Opera mails, Gmail, Poco mails, and many more. Utilizing this software the MBOX conversion is simple even a non-technical person also capable to do conversion tasks easily. However, the device also gives many features which make it the best MBOX converter. Try its free demo version to know more about its characteristics and working method.
If you need a portable application that easily converts MBOX to PST, O365, EML, MSG, Live Exchange, etc. then, I would like to recommend the MailsDaddy MBOX converter tool. The MBOX converter tool efficiently exports MBOX files over 25 email clients like Apple Mail, Thunderbird, Opera mail, Gmail, Postbox, etc. to Outlook. It is the best part of the software is that it manages folders, subfolders, inline images, attachments, etc. The software has numerous features to load and export data as well as you can try the free demo version first.