Forum > General > Upload Thunderbird to Office 365

Posted by Somit Vishwakarma on March 26, 2021


Office 365 doesn’t allows importing Thunderbird emails to Office 365 directly therefore we designed MailsDaddy Thunderbird to Office 365 Migration Tool. This independent application tool maintains folder hierarchy, rich text formatting, inline images, attachments, and other mail properties in PST file format.

User can download and install the tool for Windows machine and perform upload from Thunderbird to Office 365 format. It is helpful to convert Thunderbird data to Office 365 in the Primary and In-place archive mailbox.

For more: Migrate Thunderbird to Office 365

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David Boon says

April 14, 2021 at 06:21 PM

Import Files from Thunderbird to Office 365 using the manual method
Firstly Office 365 doesn’t support the MBOX file, so you cannot migrate the MBOX file directly to Office 365. To migrate the MBOX file from Thunderbird to Office 365, users have to convert all data into a supportive format such as EML and PST.

The manual method has two phases. In the first phase, you have to migrate MBOX file data to PST file format, and then convert the PST file into Office 365. Let’s discuss those briefly:

Convert the MBOX file from Thunderbird to Outlook
At first, create a new folder on your system.
Launch Thunderbird, open the folder where the emails are stored, which you want to migrate.
Choose the emails and then click on Save as, an option from the menu.
Browse the folder (Created on the first step) save the e-mails on it.
Import e-mails from Outlook to Office 365
Open the Outlook application on your system.
Browse the folder where you want to save the Thunderbird emails, or you can create a new folder. (make a click on the folder tab. After that, choose the new folder option, and create a new folder)
Now, click on the Ok button. The folder you have created will be shown on the left side of the email application.
Now, click on the folder to view/open its content at the center panel.
At last, drag all the emails from the desktop folder to this folder in Outlook.

I hope this manual method will be helpful!

David Boon

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