Thunderbird Outlook 365

  1. Thunderbird Vs Outlook 365
  2. Thunderbird Outlook 365 Contacts
  3. Thunderbird Office 365 Exchange
  4. Thunderbird Outlook 365 Calendar
  5. Thunderbird Outlook 365 Access

First, open the Mozilla Thunderbird on a Windows PC. Then, select the messages that need to be imported from Thunderbird to Office 365 account. Next, right-click on them and select Forward as Attachment. This will open a new email window in which emails with be added as EML attachments. For instance, Mozilla Thunderbird is roughly the equivalent of Outlook but considering it as an Office 365 product as a whole lends context to the comparison. The safety features along with the ability to collaborate online on documents in real-time makes Office 365 an attractive proposition for businesses. Kernel Office 365 Backup Backup Office 365/Exchange to PST and secure your critical data. This tool backs up and restores mailboxes in bulk and is suitable for very large organizatoins. It supports all Exchange versions, Outlook PST files, and Office 365 plans. Backup Office 365/Exchange mailboxes to PST without Outlook. Kernel Office 365 Backup Backup Office 365/Exchange to PST and secure your critical data. This tool backs up and restores mailboxes in bulk and is suitable for very large organizatoins. It supports all Exchange versions, Outlook PST files, and Office 365 plans. Backup Office 365/Exchange mailboxes to PST without Outlook.

HomeOffice 365Export Emails from Thunderbird to Office 365

Nowadays there are numerous email platforms available in the online market. Each organization utilizes the one, which suits for its management, ease as well as in budget. However, with time, when they face the requirement of a better platform then, they need the platform. Likewise, Thunderbird is a free as well as an open-source emailing platform. It is ideal for small businesses as well as personal mailing purposes.
However, if we talk about mail migration then, it is a boring task, as it needs proper work planning and investment as well. Moreover, if they need to move a large amount of data then, there are the chances of data loss as well. Therefore, one organization should make sure that it executed the data transfer in the safest as well as in an accurate manner. In this segment, we will discuss the various ways to execute Thunderbird to Office 365 migration.

Why Migrate Email from Thunderbird to Office 365?

Office 365 is a cloud-based application, which is offered by Microsoft. The web-based clients are extremely good at offering unlimited data storage as well as platform independence. It benefits users as it can be accessed anytime and from anywhere easily. Moreover, MS Office 365 comes up with a complete Microsoft suite in it, which includes Exchange, Outlook, PowerPoint, Word, etc. It helps users to manage the data easily ay one place only. These are the main reasons to choose MS Office 365 over Mozilla. Other in other words, we can say that to choose cloud-based over desktop-based.

Apart from these reasons, there are some users who want to switch from Thunderbird to Microsoft Office 365 account. The following query will make it more clear:

“Our client was using Mozilla email client from last few years for all the official purposes. But, now he wants to migrate all the Thunderbird accounts to Office 365. Is there any manual or automated procedure to transfer the complete data of Mozilla profile to the Microsoft email client?”

Techniques to Export Thunderbird Emails to Office 365

The following methods discussed below makes it easy for a user to execute the data to export Thunderbird to Office 365 in an efficient manner.

Important The manual methods require MS Outlook to be installed on the system and integrated with Office 365 account. Else, the data will only be transferred to Outlook and not Office 365.

Method 1: Moving Mozilla Profile Data to O365 Mailbox Manually

By Using IMAP

IMAP is Internet Message Access Protocol, which permits users for 2-way synchronization that is mainly between the email applications and other online mail account. It is programmed to utilize the same account from multiple email applications. Follow the steps to move your data:

  • By using IMAP server, configure Gmail account in Mozilla Thunderbird.
  • Now, make a new folder in Google Gmail after that move messages to be transferred to it.
  • All the messages to be exported in your Gmail mailbox will be present there.
  • Now, configure the same account of Gmail in MS Outlook by using IMAP and POP. Once it is done then, download all mails there.
  • Now, all the data is stored in Outlook PST format.

Note: This way can be utilized to move few mails only.

By using Drag & Drop

This process takes place in two phases, i.e. export Thunderbird emails to EML after that import EML into Outlook mailbox.

Transfer Mozilla Email Mailbox to EML

  • Choose the messages to be exported from Thunderbird.
  • Make a new folder on the desktop.
  • After that, drag all the mails and drop it into the folder created on the desktop.

Upload EML into Outlook Account (integrated with Office 365)

  • Open MS Outlook on your machine.
  • Now, navigate to the folder where you need to import Mozilla Thunderbird messages.
  • Drag all the data, which is stored in the new folder on the desktop into MS Outlook folder.
  • Now, all the data is stored in Outlook.
  • Move this data into the integrated Office 365 account within MS Outlook.

Thunderbird Vs Outlook 365

Note: This process works only with Microsoft Outlook 2010 and its earlier editions. Moreover, though this procedure is free of cost but it is not favored as it takes consumes a lot of time.

Once the data is exported into PST format. Now, one can easily upload all PST data files into MS Office 365 mailbox to utilize the data on the cloud.


The above method is quite lengthy as well as time-consuming. Moreover, there are the chances of data loss as well by using this process.

Thunderbird Outlook 365 Contacts

Method 2: One-Stop Solution for Thunderbird to Office 365 Conversion


To overcome the issues faced by the above method, there is a software namely SysTools MBOX to Office 365 Migration tool. It is an advanced structured utility that makes it easy to import Thunderbird emails to Office 365 mailbox without any hang-ups, flaws, compilations, etc. The application only needs the credentials of the MS Office 365 mailbox. The software is simple as well as easy to utilize without any complications. The utility offers numerous advanced features that make it easy for one to export Mozilla Thunderbird data to OWA account.

Prominent Features of Tool

  • With the help of the utility, one can not only migrate Thunderbird data into Office 365 mailbox but can execute it in bulk amount without facing any hang up the experience of system.
  • The application lets you move all Mozilla mailbox emails securely into Outlook online mailbox without challenging you with any difficulty.
  • A user-friendly graphical interface of the utility is useful in utilizing the tool with ease as well as understandability.
  • The tool gives an inbuilt date filter to transfer multiple data items by date.
  • One can convert Thunderbird MBOX data into Office 365 smoothly with any version of Windows installed on your machine as our tool supports all versions.
  • Permits the data conversion with or without Impersonation.

Simple Steps to Export Thunderbird to Office 365

Cannot send emails office 365 thunderbird

Thunderbird Office 365 Exchange

  • Step 1: Run the migrator & select Thunderbird MBOX files
  • Step 2: Select “With or Without Impersonation” setting
  • Step 3: Input required User / Admin credentials
  • Step 4: Set filters and click “Export” to migrate Thunderbird to Office 365.

Thunderbird Outlook 365 Calendar

Summing Up

Thunderbird Outlook 365 Access

Moving emails is a complex task for users especially for those who are not familiar with the technicalities of platforms. Similar is the case for importing Thunderbird to Office 365 mailbox. Therefore, we have come up with some ways to move data from Mozilla email account to Microsoft Outlook 365 mailbox.