The manual procedure to convert Thunderbird MBOX file to Office 365 involves two phases, viz. Exporting MBOX data to Outlook, and then moving Outlook data to Office 365. Here are the broad steps to cover these phases: 1. In Thunderbird, open the folder containing the emails to be migrated 2. Migrate Thunderbird to Office 365 directly without requiring Technical knowledge using this Thunderbird to O365 Migration software. Users can easily Import/Export Thunderbird Emails to Office 365 just by providing Outlook.com account login credentials in the application panel. There are various reasons that makes using Outlook Web Access (OWA) a preferred choice for the users. In this tutorial I will show you how to add office 365 calendar in Thunderbird Email Client#howto #tutorial #stepsbysteps #resolved #office36. Owl, also called Owl for Exchange, is a Thunderbird add-on software that allows the Mozilla Thunderbird email client to connect to some Microsoft Exchange servers and receive and send emails via such servers.

This article explains how to configure the Mozilla Thunderbird email client to receive your Illinois State University Office 365 email account.

Add your Office 365 email to Thunderbird

To configure Thunderbird, do the following:

1. Open Thunderbird.
2. Click the Thunderbird Menu icon (three horizontal bars) at the upper-right of the Thunderbird pane.

Image Description: A screenshot of the settings button within Thunderbird.

3. Hover your cursor over Options and click Account Settings.
   Image Description: A screenshot of the “Account Actions” tab within Thunderbird’s advanced account settings.
4. Click Account Actions and then select Add Mail Account….
5. Enter your name in the field labeled Your Name.
6. Enter your email address in the field labeled Email Address (i.e. yourULID@ilstu.edu).

Image Description: A screenshot of the section where you will enter your personal information. Press Continue after entering your sensitive account information.

7. Enter your ULID password in the field labeled Password, and then click Continue. Configuration found at email provider will appear, but you have to click Manual Config.

Please Note: Thunderbird will automatically try to set up the connection using default configurations, but you will need to click the Manual Config button to enter the correct configuration.

Image Description: A screenshot of the account set up page. Here, you will click “Manual Config” so that you can manually enter the information posted in this article to ensure you are correctly configuring your account.

8. For Incoming Server hostname enter outlook.office365.com,change Port to 993, change SSL to SSL/TLS and Authentication is Normal password.
9. Enter smtp.office365.com in the Outgoing Server hostname field, change Port to 587, change SSL to STARTTLS and Authentication is Normal password.
10. Enter your complete email address (i.e. yourULID@ilstu.edu) in the Incoming and Outgoing Username fields.

Image Description: A screenshot of the email account set up page.

12. Click the Re-test button. You should get a message stating, “The following settings were found by probing the given server”.

Image Description: A screenshot of the email account set up page. Click “Re-Test” to ensure that the credentials you have entered are correct, then you will click connect.

14. Click the Done button.
15. Click OK to close the Account Settings window.

Thunderbird is now configured for use with your Office 365 email account.

Important: All of your folders will not automatically be viewable in Thunderbird. To be able to view all of your folders, see the section below, entitled “How to View Your Folders in Thunderbird”.

Not working? Make sure you entered your email and password correctly and try again. Also, be sure to update the server to outlook.office365.com vs .edu.

How to View Your Folders in Thunderbird

You may view all, or some, of your folders in Thunderbird. In order to do so:

1. Within Thunderbird, click on your email address, on the left side of the Thunderbird window.
2. Under Advanced Features, click Manage Folder Subscriptions.
3. A pop-up window will open, entitled Subscribe, which will display all of the existing folders for your email account. Place a check to the right of any folders you would like to be able to view within Thunderbird.

Image Description: A screenshot of the Advanced Features section with an arrow pointing to the “Manage Folder Subscriptions” button.

Note: You will need to click the arrows to the left of any expandable folders in order to be able to view and select any sub-folders for subscription.

4. Once you have selected all of the folders you would like to be able to view, click Subscribe > OK.

You will now see the selected folders underneath your email address within Thunderbird.

Important: The new folders will not automatically populate with your email messages. When you click on a folder to view the contents, Thunderbird will then sync your email for the selected folder.

Removing an Email Account from Thunderbird

For information regarding how to remove an email account from Thunderbird, please refer to:

How to Get Help

For technical assistance, you may contact the Technology Support Center at (309) 438-4357, or by email at SupportCenter@illinoisstate.edu.

Back to Overview:

Email migration is quite a challenging task. Different organizations use different strategies to perform Thunderbird to Office 365 migration. Any organization that undertakes it typically needs to export thousands of bulky mailboxes from one platform to another. In addition to the hurdles and risks involved, format incompatibilities between the source and destination platform play a crucial factor. If your organization wishes to export MBOX to office 365, this post is for you.

In this article, we are going to discuss manual methods to migrate MBOX to office 365. But before moving towards on different solutions to import the MBOX file to Office 365 account, let us shortly discuss the major reasons for this migration process.

Why you wish to migrate Thunderbird to Office 365?

Following are some of the reasons for moving from Thunderbird to Microsoft cloud services with O365:

• Office 365 provides added features of data share, storage, communication, and collaboration.
• It also added security and data storage benefits with O365 cloud servers.
• To get unlimited Office applications like Word, Excel, Access, Skype, Exchange server, etc.
• It provides all the Office suite applications including Exchange online server and Office 365 Mail App at low cost.
• This enables businesses to import or migrate Thunderbird emails to office 365.

Methods to Migrate Thunderbird Email To Office 365

Following are some of the manual methods for transferring mailbox information to the Microsoft cloud servers with Office 365:

Method 1. Import MBOX Files to Office 365

Thunderbird O365 Shared Mailbox

The manual procedure to migrate Thunderbird MBOX file to Office 365 involves two phases, viz. Save Thunderbird Email to Windows PC and then Import EML to Office 365. Here are the broad steps to cover these phases:

Step 1: Save Thunderbird Email to Windows PC

• First, create a new folder in Desktop.
• Next, launch the Thunderbird application on the system.
• After that, open the message folder where you need to move emails from Thunderbird to MS Outlook are saved.
• Then, select all the messages using the Ctrl+A key.
• Now, Right-click on the messages and select Save As option.
• Finally, Browse to the desktop folder land save the emails there.

Step 2: Import EML to Office 365

• First, launch the Outlook email application.
• Now, go to the folder in Outlook where the Thunderbird messages will be saved.
• Or, select the Folder tab and select the New Folder option.
• In the Create New folder dialogue box, set a name for the new folder.
• After that, click on the OK button to migrate Thunderbird email to Office 365.
• Now, this folder will see on the left panel of the email application.
• Next, click on the Folder to open its content on the center panel.
• Finally, drag all the messages from the Desktop folder to this folder in Outlook.

Method 2. Forward As Attachments

• Open the Mozilla Thunderbird on a Windows PC.
• Then, select the messages that need to be imported from Thunderbird to the O365 account.
• After that, right-click on them and select Forward as Attachment.
• You will encounter a new email window in which emails with be added as EML attachments.
• Next, type in an email ID to migrate MBOX to Office 365.
• Then, click on the Send button.
• When the process is finished, view the Thunderbird emails on Office 365 Mail App.

Verify the migrating process by logging into the O365 and opening each email one at a time through a browser in EML format.

Limitations of Migrating Thunderbird Email To Office 365 Manually

• Limited to Some Emails: The process to transfer Thunderbird emails to Exchange Online is not meant to move the complete email folder containing over 1000 emails. It can only export some important conversations.
• Lengthy Process: It may take a lot of time in moving each email one at a time to desktop and then to Outlook.
• Time-Consuming: Forwarding hundreds of Thunderbird messages to Office 365 with large attachment files may take a lot of time.
• Data Integrity: Often email formatting or SMTP header is changed for some emails during transfer.

Thunderbird O365 Manual

Method 3 Professional Approach to migrate MBOX files to Office 365.

Thunderbird O365 Settings

The above-mentioned methods to migrate MBOX files to Office 365 would not be suitable for migrating a huge amount of emails, attachments, contacts, etc. So, it is better to rely on professional software that specializes in exporting Thunderbird mailbox data to Office 365. Using a third-party tool can easily overcome all the drawbacks of Manual methods. You can use the MBOX Exporter Utilityto do this migration easily.

Thunderbird O365 Modern Authentication

Conclusion

This post describes a long and tedious manual way that is used to migrate multiple mailboxes. It also discusses reasons to make the entire task much easier for administrators. But as you can see manual methods has some drawbacks and also there is a chance of loss of database. So, I recommend you to use a third-party tool to migrate thunderbird to office 365.

Thunderbird O365 Parts

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