Import Thunderbird to Office 365 (MS Outlook) – The challenges and best practices.
Import Thunderbird to Office 365 for Mac and Windows
Looking to get the data moved from Thunderbird to Office 365?
The answer offered here is the best you will get. Such migration tasks can get overwhelming and we are here to make it easier for you.
Thunderbird and Outlook and Email Migration!
Thunderbird is a cross-platform email client, while Outlook is for Windows. Even though there is a Mac Outlook, but it is a different client, just with a different name. Both of them have wonderful features and interface that have made them quite popular among users. But sadly, there is no such equivalent way to migrate data across.
If you are switching from Thunderbird in Mac to Outlook in Windows, there is a bit of a work in your hand.
Neither developers (Mozilla and Microsoft) offer a direct, official, and a proper way to move emails and other contents from one to another. Also, there is no file that can be read by both.
Thunderbird uses standard MBOX file but cannot export the data to PST, which is the only format Windows Outlook can take as an import file.
Manually Move Data Using Other Methods!
Since, there is no official app from either side and no common file shared by both clients, you are left with migrating data manually or with the help of a third-party tool.
If you want to go the manual route, we would recommend you do so at your own risk. It may turn out fine if you have one or two folders at maximum. Anything more than that, you are going to lose the details, structure, and even actual files while trying to migrate them.
This is the reason we are not discussing the manual techniques in detail here, since we often suggest our readers to avoid them.
Which brings us to the last remaining choice you have: using a third-party software application.
Third-Party Applications Do Not Come by Easily!
If you have decided to keep the manual methods of import Thunderbird to Office 365 at bay, good for you. You are going to avoid some severe data loss and will also save your precious time.
However, using a dedicated utility built only for Thunderbird migration is definitely the safer and effective approach, it may too turn out to be a bad idea depending on the application you pick.
There are dozens of different Thunderbird to Outlook converter to get from. And not only that search in itself can get tiring, once you find the tool, you may need to have some understanding of the files and databases. The reason being that most third-party converters are not built for easy and seamless migration either.
Mail Extractor Pro for Direct Thunderbird to PST – The best Possible Method!
Mail Extractor Pro is what you need.

In the sea of sloppy and mediocre solutions, “Mail Extractor Pro” is a godsend. It works perfectly with database and all the crucial details in them. It is the only tool that gracefully combines simplicity and advanced functionality for professional results.
Some of those advanced features include:
- The choice to get Thunderbird native database directly for conversion (forget about selecting any files)
- Choose the maximum size for output PST files you want and let the tool split the larger ones for easily importing them to Outlook later
- Brief and detailed conversion log
- Unicode text conversion works on all languages and writing systems
- Technical support throughout day and night by USL Software
Get it to import Thunderbird to Office 365
Mail Extractor Pro is truly a wonderful application that puts all other email migration apps to rest. Do not hesitate to get it. The trial version is free to download here.