Import Thunderbird to Office 365 – Importing different files to a program that does not support is difficult and impossible in many cases.
Way to Import Thunderbird to Office 365 (Mac & Windows)
Importing Thunderbird to Office 365 is impossible. Therefore, you first need to convert it to PST, where PST is the format Office 365 can read for importing data. It is the native file format of Outlook along with the OST. Another use of PST is that it can also be used with Mac Outlook, which means that if you can convert Thunderbird to PST successfully, you can even use it with the Mac’s version.
But such a project of file conversion itself is trickier than you might think. Both files share no common architecture and design to make the job easy for the converters. To extract information and to put it into another file with precision is hard and only few applications come close in terms of their accurate results.
Whether you are a basic home user or work in a large company that want to import Thunderbird to Office 365, you need a tool that can keep the details and structure of emails intact.
On top of that, the tool you pick for this job should be easy enough to use so that you do not waste time trying to navigate through the terrible interface that otherwise many mediocre converters have to offer.
Not to mention, any software application to fulfill its purpose have to be equipped with many other generic but crucial aspects: speed, stability, support, functionality, usability, etc.
Tool to Import Thunderbird to Office 365
There is one tool that fits the above description well: “Mail Extractor Pro”.
If you want to convert or import Thunderbird to Office 365, do not think twice to choose “Mail Extractor Pro” right now.

Works on MacOS
It is a fully professional, MacOS based software application that will do the job as you want it to. It works with every little piece of information in files and does not falter at any point. In other words, it is stable, accurate, and gives the users ultimate experience of email migration.
Simple and Easy Interface
The interface is simple too. Which is another fundamental quality of all successful applications. Without a natural and easy to navigate UI, any sophisticated functionality is dead in the water. If you cannot pick up how the features work intuitively, you are going to waste time unnecessarily, and that is no good. It defeats the whole purpose of using a software tool.
But “Mail Extractor Pro” has the deliberate simplistic UI elements that renders the whole process straightforward.
However, do not be tricked by the minimalistic UI. Despite being very clear-cut and candid, the tool features some of the most wanted options/functions that have been missing earlier from similar converters. This goes to show that USL Software is dedicated to all kinds of users – basic home users and experts.
Convert Multiple Source to PST
It is worth noting that “Mail Extractor Pro” is built as a one-in-all solution for migrating your emails to Office 365 from popular clients like Apple Mail, Thunderbird, and Postbox, and it can do so by directly loading their primary databases without asking you for files or anything. Thunderbird to Office 365 is one of its conversion features, which is what we focused on here.
Quick Easy and Accurate
Getting your precious emails from one program to other is an important job for anyone. And USL Software understands that better than anyone. This is why all their tools, including “Mail Extractor Pro,” has not only given the most powerful way to move important emails but also a quicker, easier, and much more affordable options than most others.

Other Benefits
USL Software also extends their services in other ways, like:
- All updates ever free for lifetime
- Tech support around the clock
- Various licensing schemes to fit the scope of your needs
How to Import Thunderbird to Office 365
- Launch it on MacOS.
- Click on “Thunderbird/Postbox: Load“
- Load Thunderbird Mails
- Auto Load – Choose it to auto detect Thunderbird Mail database.
- Open – Choose it, if you have copy of Thunderbird ‘Profile’ folder from Windows System or from another computer.
- Optional Settings:
- Check Ignore Empty Folders
- Check/Uncheck Folders, that you want to convert.
- Set PST file Size
- Click on “Convert“
Try it to import Thunderbird to Office 365 Mac & Windows
You can download the installer file here, which is less than 30 mb. It installs within minutes, which means you can begin the trial version in no time and get it thoroughly tested by your own standards and see if all of the above holds.