How to migrate Thunderbird emails to Office 365?

Import emails from Thunderbird to Office 365

by lesofa

There were many people who were searching for a prompt solution for importing email from Thunderbird to Office 365 without any complications. So keeping this situation in mind. We have written this blog . The main motive for writing this technical writer is to provide you with a brief bunch of details. If you want to know more about the migration process, continue reading this blog until the end. so that you will clearly understand the whole procedure.
There could be many reasons for exporting email from Thunderbird to Office 365.


Various reasons are required for exporting email from Thunderbird to Office 365.

Since most of the users use smartphones and tablets, they have to access their work over the platform, but this facility is not available in Thunderbird, so users are required to export Thunderbird emails to Office 365.
There are some premium solutions in Office 365. You can use the solution according to your choice
Afterward moving to Office 365 Office, the users get the unlimited office program preferred by Microsoft such as Skype, Exchange server, Microsoft Word, Excel, Powerpoint, et for free
In this blog, we are going to describe two different methods of migration step by step.

Method 1 – Import emails from Outlook to Office 365

Method 2 – Automatic solution for migration of Thunderbird to Office 365.

Manual process -Import emails from Outlook to Office 365

1-You can export your Thunderbird emails to Office 365. By using IMAP

Step 1- First you have to configure a Gmail account in Thunderbird using IMAP Server.
Step 2 – Then a new folder in Gmail and move all emails to be traced in that folder.
Step 3 – After the installation the exact Gmail account in MS Outlook ( using IMAP or PoP).
Step 4 – Downlaod all the emails in MS Outlook.
Step 5 – after that, you can move these loaded emails into the connected office 365 account.
Step 6 – Now you have effortlessly copied data from Thunderbird to the PST file of MS Outlook and gradually into the O365.

Then the second method is to import Thunderbird emails to Office 365

2-Using Import Thunderbird EML mails to Office 365

You can save Thunderbird mail as EML files. by this method also.
Step 1 – you can create new folder on the desktop.
Step 2- After that start the Mozilla Thunderbird and select the messages which need to be copied.
Step 3 –You have to right–click on any selected messages and choose Save as option.
Step 4 – Once you to done with browsing to the new folder created in the above scenario and save the emails there.
Note – You can also drag and drop the messages to the new folder instead of using the “Save As” option.

Though you can import EML to Outlook

Step 1 – Go with MS Outlook application.
Step2 – Make a new folder in MS Outlook or choose an existing one where the emails from thunderbird need to be copied.
Step 3 – Then drag all the saved EML files from the Desktop Folder to this new folder to this new folder in Outlook.
Step 4- In the end move the emails from the new folder into office 365 account.

Although this manual method has many drawbacks, you have to know about its terms and conditions before using it.

  • If we talk about its progress, it does consume a lot of time while migrating Thunderbird to Office 365.
  • You can’t transfer Thunderbird to Office 365 in bulk. There is lots of limitations.
  • Your data quality does not remain the same after the migration process.
  • There will be a 100% chance of data loss . since attachments are found to be empty in many cases.

Well, all of these scenarios have their drawbacks, and we have another method for migration. We have discussed the method in the below portion.

Method 2 – Automated Solution for migration of Thunderbird to Office 365.

After discussing the manual method and its terms and conditions, you want a quick and easy solution. But don’t worry; with the help of Thunderbird to Office 365 Converter, you can make your work more flawless, because this is a professional tool that has been tested by experts. Therefore, this process is no longer complicated. You can use this software without any obstructions. This software generates a complete view of your migrated data.

Therefore, this application has many versatile features

  • With the help of this tool, you can migrate in bulk, from Thunderbird to Office 365.
  • You can save your time during migration.
  • It automatically provides a complete scan preview of your exported data.
  • This app exports MBOX mail with its meta properties intact.
  • Whereas its operating steps are so simple, thus an ordinary person can also work with it.

 Follow the given steps below-

Download the software and run it successfully on your system.
Choose MBOX files by selecting a folder or files one by one.

Go and choose type office 365.

Thunderbird to office 365
Provides the credential of Office 365.

Thunderbird to office 365
Opt for the folder to save the exported data.
hit the export tab to automate the conversion.


We hope that you read this blog carefully and that you will get all the answers to your question. The main purpose of this technical writer is to inform you more about the proper method of migration. You can go for the professional method, which is an automatic method. Therefore, we have distinguished both methods. So it will become easier for users to compare both methods. We suggest you go for the professional method because it has no pros or cons. Where else can you go and try the demo version, of it to check its programming features

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