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Solution – How to Migrate Emails From Thunderbird to Office 365?

Karen Chard ~ Modified: 06-06-2022 ~ How To ~ 6 Minutes Reading


Overview: Are you looking for the methods to migrate Thunderbird to Office 365? If yes, then you are at the correct destination place and your search ends here. If you want to know how to do the complete migration process, then stay with us till the end.

Thunderbird supports the Internet Standard Access Methods (POP3 & IMAP), but it failed to support Microsoft proprietary protocols (MAPI) to access Exchange Server & Office 365. If the administrator does not allow IMAP access, connecting Thunderbird with Office 365 does not work.

As in the present time, a trend of the switch from desktop-based service to cloud-based has increased. So, in the same context, many users are looking for a way to do Thunderbird to Office 365 Migration.

“In the beginning, we used the Thunderbird application with free Gmail for communication, as it is a free open-source email client. After a few years, our company is now working on a big scale. Therefore, we are moving to an intuitive and feature-rich email application that is capable of addressing all the problems that we used to encounter previously. Office 365 is the perfect suite to match our expertise. But I don’t know how to migrate emails from Thunderbird to Office 365 directly. Please suggest to me the best solution to migrate the data without facing any kind of data loss”

There are various reasons that make using Outlook Web Access (OWA) a preferred choice for the users. Office 365 is a versatile service of Microsoft that runs on almost all Browsers just having a suitable Internet connection and Web device. On the contrary, Thunderbird is a desktop-based application having supports lots of Webmail and email hosting services compatibility.

A Free Method – Thunderbird to Office 365 Migration

Thunderbird supports a variety of email access methods like POP3 and IMAP4. It does not support Microsoft’s proprietary protocols to access Office 365 or Exchange servers. If your IT admin doesn’t permit IMAP, then you won’t be able to use this method. Only if you have the IMAP settings for the server will you be able to configure Office 365 account here. So, request it from your admin.

Here, we are showcasing how to configure the account if you already have the IMAP settings and port numbers. This Thunderbird to Office 365 migration process involves 2 steps, so follow them well.

Step 1: Configuration account

  • Run Mozilla Thunderbird email client.
  • Hit the Alt+F key to open the File menu.
  • Go to New and click on the Existing mail account option.
  • In the Mail Account Setup window, input your name, Office 365 email address, and password, and click the Continue button.
    add mail account option
  • Click on the Configure Manually option and input the IMAP settings that you got earlier:
    • Incoming: IMAP, server name – outlook.office365.com, port – 993, SSL – SSL/TLS, Oauth2 authentication, username – your email id
    • Outgoing: SMTP, server name – smtp.office365.com, port – 587, SSL – STARTTLS, Oauth2 authentication, username – your email id.
      enter office 365 details
  • Finally, hit the Done button to authenticate the process.

Step 2: Migrate Emails From Thunderbird to Office 365 Account

  • Select the Thunderbird emails you want to migrate to Office 365.
  • Right-click on the selected message.
  • Click on Copy to | Your O365 account folder.
    copy emails to office 365 account
  • This will copy your emails into the Office 365 account. You can open the O365 on a web browser to check if all the emails are imported successfully.
  • That’s it!! The process is now complete.

A Professional Way to Migrate Thunderbird to Office 365

It is evident that the free manual method will not be successful without the IMAP settings. Hence, you will need a professional tool to take care of such a scenario. RecoveryTools Thunderbird Migrator is the perfect choice for the users to do so as it allows them to migrate emails to Office 365. Also, this tool provides the option to migrate not only some but multiple data within a single attempt without having any kind of loss of data.

Additionally, the software supports 25+ formats for conversion, migration, backup, and for other processes. It can easily such as Thunderbird to PDF, Thunderbird to Yahoo Mail, Thunderbird to Gmail, Thunderbird to MBOX, Thunderbird to Lotus Notes, and multiple others.

Free Download Thunderbird to Office 365 Migration Tool:

Download for Windows Download for Mac

Complete Steps to Migrate Emails From Thunderbird to Office 365

The working of the utility is very easy and simple to execute. Just download the software from above & then install it on your Windows PC. Follow these simple steps to further the process:

  • Firstly, Run the migration software & read all instructions.

thunderbird to O365 imap migration

  • Secondly, select the Thunderbird Mailbox items manually or from the configured location.

choose Thunderbird folders

  • Next, choose folders which you want to Outlook.

Select Thunderbird folders to Office 365

  • From 20+ Saving lists choose Office 365.

choose office 365 option

  • Enter account login credentials of the Office 365 account for the migration.

enter account details

  • Click on the Convert button & start the migration process.

Features of Thunderbird to Office 365 Migration Tool

  • Direct Option for Migration

The software allows the users to perform the migration of entire mailbox data without imposing any kind of size limitations and without any disruption. In fact, without the need for any kind of technical guidance, it is possible for users to migrate an unlimited number of data items such as emails, contacts, calendars, and others.

  • Migrate Unlimited Amount of Thunderbird Mailbox:

The software allows us to migrate emails into our Office 365 account regardless of volume or size. It also provides users the option to autoload Thunderbird emails and contacts from the default profile location.

  • Easy & Effortless Tool

The software is one of the simplest solutions to perform Thunderbird to Office 365 migration. It has a user-friendly interface that can be easily used by all the users whether they are from technical or from a non-technical background. In fact, it can easily work without any additional help.

  • Maintains Metadata Properties & Attachments:

The software is designed with advanced algorithms to maintain Thunderbird emails, metadata & properties. All the email’s Metadata attributes like To, Cc, Bcc, etc. will be kept original. The attachments inserted with the emails will also be migrated during the email migration.

  • Windows Compatible Solution:

This software is compatible with all the latest Windows editions as well as Mac OS editions. Users can run this software on Windows 11, 10, 8.1, 8, 7, XP, Vista, etc. for both 32 & 64-bit OS and on all others versions of MAC OS.

Thunderbird to Office 365 Migration Video Tutorial

In Conclusion

In the end, we just want to say that we had explained both the manual as well as the professional solution to migrate emails from Thunderbird to Office 365. Both the solutions mentioned above are easy to use and will provide better migration results during the entire process. There are multiple other solutions also mentioned on the Internet but it is better to opt-out of this professional utility as it is effortless to use and will not need many technical efforts.