How to Migrate/Import Thunderbird to Office 365?

July 13th, 2021 ~ Migration Tips ~ 3 Minutes Reading

In this article, we will discuss How to Migrate Thunderbird to Office 365? If you are experiencing a similar issue, then this post will be helpful to you.

Office 365 has benefits. Users prefer its paid goods over the free ones. Thunderbird, like Outlook, is part of Microsoft Office 365. Office 365 is popular with companies because it combines real-time collaboration and security.

Microsoft Office 365 provides extreme versatility. Thunderbird is often used for migrating options. That’s why users want to migrate Thunderbird to Office 365

Organizations use several methods to Migrate Thunderbird to Office 365. Preparation, testing, and risk are always part of such a move. While manual methods exist, automated mailbox conversion software has been shown to provide favorable performance.

This is seen in the next parts where we cover both manual and automatic Thunderbird to Office 365 conversion methods. This article is for companies who want to Export Thunderbird Data to Office 365.

Why Move From Mozilla Thunderbird to Microsoft 365

Administrators moved Thunderbird users to Office 365 for a variety of reasons, including growth, security, flexibility, and affordability.

  • Coordination and communication characteristics
  • Cloud facility subscriptions
  • Microsoft servers provide data and security.
  • Scalability and feature selection
  • Device compatibility

Apps like Microsoft Word, Excel, and Teams enable members to share tasks more easily

Manual ways to Transfer Thunderbird to MS Office 365

It takes two steps to manually Migrate Thunderbird to Office 365 account: first, exporting MBOX File from Thunderbird and importing into Outlook, and then transferring Outlook data to Office 365. The following general stages address these phases:

  1. Access the transferred emails folder in Thunderbird.
  2. Now Choose ‘Save As‘ from the menu to save the emails.
  3. Then Locate an appropriate destination folder on your computer’s hard drive and store the file there.
  4. Now create a new folder in MS Outlook.
  5. Lastly, Drag the emails from the system folder (as specified in step 3) into the newly created Outlook folder. You may see emails in Outlook.

By Using Office 365 Import service

  1. Firstly, Sync your Outlook PST folders
  2. Now Install “Microsoft Azure Storage Tools” (from Microsoft)
  3. Use the program to obtain the unique network URL and key.
  4. Then Upload PST files using azcopy.exe.
  5. Now Prepare your mapping file in Microsoft’s format.
  6. Lastly, import PST data into Office 365.

Drawbacks of Migrate Thunderbird to Office 365

  • This method does not ensure full and correct Thunderbird to Office 365 Migration.
  • The procedure will take a long time to finish.
  • During the transfer, some emails may be lost.
  • Ineffective for batch migrations

To avoid such limitations, users must utilize a more sophisticated and easy technique for Migrating Thunderbird mailboxes to Office 365.


In conclusion, Various Email clients don’t accept the same data file types, though. Consequently, businesses and administrators may need to migrate email when moving email providers, merging numerous accounts, or backing up mailbox data (see below). Manually transferring mailboxes across platforms is possible using free programs, but the procedure is difficult and glitch.