MBOX is a file format used to store large number of emails in a single file, both sent and received messages, and use the .mbox extension. With it, all the messages of a mailbox can be concatenated in a single document, which will allow you to access each of the emails.

This type of file stores the mail in a concatenated way, so that each one is stored after the other. It is a format that was originally created for Unix systems, but over time has been supported by the main mail applications, such as Mozilla Thunderbird and the Apple Mail program or clients like Gmail.

Despite being supported by many email clients, MBOX files still lag as compared to Office 365 in features such as advanced security and flexibility. All of these are primary reasons behind MBOX to Office 365 migration. Therefore, the guide will discuss the various reasons behind the migration and corresponding solutions to perform migration tasks seamlessly.

Reasons to migrate MBOX to Office 365

There are numerous reasons that initiate users to migrate MBOX data to Office 365. Some of them are mentioned below:

  1. Office 365 is a cloud-based service that allows users to access their data from anywhere.
  2. Provides excellent support for users in handling issues they face.
  3. Offers integration of multiple applications that increase productivity and help in collaboration.
  4. Provides additional security as compared to MBOX files.
Methods to migrate Thunderbird MBOX to Office 365

The process to migrate Thunderbird to Office 365 includes 2 parts. Let's have a look at them:

Set-up Office 365 profile in Thunderbird

Setting up Office 365 profile in Thunderbird can be done with the following methods. Attempt them carefully:

Part 1. Configure Office 365 account in Thunderbird

To configure your Office 365 account in Thunderbird email client, follow the steps mentioned below:

Step 1. Open Thunderbird application, tap on Settings, and select Account Settings. Open Thunderbird and select Account Settings

Step 2. Under Account Actions, press on Add Mail Account. Add Mail Account

Step 3. Enter your Office 365 account credentials, click on Continue, and press Done. Enter your Office 365 account credentials

Part 2. Import MBOX files into Office 365 account

Once you've successfully set up your Office 365 account in Thunderbird, it's crucial to follow the steps provided in the given order to ensure a smooth and error-free process.

Step 1. Press on Add-ons and Themes under Settings. Press on Add-ons and Themes

Step 2. Find ImportExportTools NG and tap on +Add to Thunderbird option to install the add-on. click add to thunderbird

Step 3. Right-click on Local folder> tap on ImportExportTools NG and proceed to Import mbox Files option. (e.g Local folder created for importing MBOX files.) click ImportExportTools NG then Import mbox Files

Step 4. Choose Import directly one or more mbox files and click on OK. select import directly one or more MBOX files

Step 5. Select MBOX files that you want to import in Office 365 and press on Open option.

Step 6. Your MBOX files are now successfully imported into Office 365.

Automated tool to migrate Thunderbird to Office 365

The above-mentioned manual method is time-consuming, as well as requiring technical knowledge. The best alternative to all these issues is using a professional tool. We recommend Kernel MBOX to Office 365 tool. . It's a robust tool with user friendly interface, designed especially to migrate MBOX files to Office 365. This tool offers a wide variety of advanced features to make the conversion process simple for you. They are as follows:

  • This tool is compatible with around 20 MBOX email clients including Apple Mail, Entourage, Mozilla Thunderbird, Eudora, Opera Mail, Claws Mail, etc.
  • This tool offers a live preview of mailbox data and maintains the data hierarchy and its meta property at the time of migration.
  • This tool can easily migrate multiple MBOX files at a time without any file size limitation.
  • You can easily perform the migration process from Thunderbird to Office 365.
  • Save 25 items per folder with its trial version.

Final Word

Migrating MBOX to Office 365 becomes a necessity when we want to access our personal emails in new Office 365 mailbox. But, exporting a huge amount of data without any conflicts is not easy, especially when you’re not aware of the techniques. This guide has provided a comprehensive overview of a reliable method for migrating MBOX files to Office 365. Furthermore, using an advanced Kernel for MBOX to Office 365 tool can help you avoid complex manual procedures and data loss associated with it.