Finally, view the Thunderbird emails on Office 365 or Microsoft 365 Mail App.Next, type in an email ID to migrate Thunderbird to Outlook 365.This will open a new email window in which emails with be added as EML attachments.Next, right-click on them and select Forward as Attachment.Then, select the messages that need to be imported from Thunderbird to Outlook account.Open Mozilla Thunderbird on a Windows PC.Finally, drag all the messages from Desktop folder to this folder in Outlook and your data will be migrated successfully.

Next, click on the Folder to open its content on the center panel.

Now, this folder will be shown on the left panel of the email application.

Next, click on the OK button to migrate Thunderbird email to Office 365 or Microsoft 365.

In the Create New folder dialogue box, set a name for the new folder.

Or, select Folder tab and select the New Folder option.

Then, go to the folder in Outlook where the Thunderbird messages will be saved.

Then, Browse to the desktop folder and save the emails there.

Next, Right-click on the messages and select Save As option.After that, open the message folder where the emails that need to be moved from Thunderbird to MS Outlook are saved.

Next, launch the Thunderbird application on the system.First of all, create a new folder on Desktop.Step 1: Save Thunderbird Email to Windows PC Method #1: Import EML Files to Office 365 Methods to migrate Thunderbird mailboxes to Office 365Īs mentioned before, there are several methods of conversion. In this blog post, we will discuss them in detail. There are several methods available for migrating Thunderbird to Office 365 account. So, migrating Thunderbird mailboxes to Office 365 would first require converting all the data into a supported format such as Portable Storage Table (PST) or EML. Firstly, Office 365 or Microsoft 365 doesn’t support MBOX file type that is used in Thunderbird for storing mailboxes-comprising emails, attachments, contacts and calendars, etc. However, migrating Thunderbird emails to Office 365 or any other email client along with attachments is not an easy task. Mozilla Thunderbird mail users are migrating to Office 365 or Microsoft 365 for reasons like security, scalability, availability, collaboration, and affordable subscription-based pricing.

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