Why Thunderbird Not Working With Office 365? Expert Guide

Have you also tried and witnessed that your Thunderbird not working with Office 365 account? If yes, then this blog can help you in this matter as it covers all the aspects related to Thunderbird stopped working with Office 365 error.

Thus, in the Thunderbird not working with Office 365 issue, the user encounters a continuous prompt to enter the password, loses access to send and receive emails, fails to sync with the server, and so on. All of this creates inconvenience and risk of data loss among the users. Therefore, to sort this Thunderbird not working with Office 365 issue, the user can simply follow the manual ways mentioned below, as well as get the automated solution to keep the data safe.

Reasons Behind Thunderbird Not Working With Office 365

• The primary reason Thunderbird stopped working with Office 365 is that the settings are set to the basic authentication method, which is now disabled by Microsoft.
• Also, if the user enters the wrong server credentials or chooses incorrect settings, then Thunderbird stops configuring the Office 365 account.
• Sharing the normal password instead of the App Password also creates technical errors and leads to such authentication issues.
• In addition to that, blocking of the mailbox for IMAP or SMTP settings by Office 365 itself also results in Thunderbird not working with Office 365.
• Apart from this, blocking by network or firewall or using outdated Thunderbird can also eventually make Thunderbird stopped working with Office 365.

Manual Ways to Fix Thunderbird Stopped Working with Office 365

There are multiple solutions to resolve Thunderbird email not working with Office 365. However, the most prominent conventional solutions that users always find helpful in such a situation are mentioned below:

1. Install the Updated Thunderbird

1. First of all, run Thunderbird on your account.
2. Once done, go to the Help option.
3. Then, choose the About Thunderbird option.
4. Now, check if there is any update available.
5. If yes, then update Thunderbird immediately to fix Thunderbird not working with Office 365 account.

2. Change the Authentication Way to OAuth2

1. Run Thunderbird on your device.
2. Click on the menu icon (three horizontal lines) and select Account Settings.
3. Now, from the left panel, click on Server Settings of the selected Office 365 account.
4. Then, in the Authentication method, choose the OAuth2 option.
5. Further, scroll down the left panel and click on Outgoing Server (SMTP).
6. Next, click the email ID and select the Edit button.
7. Once done, make changes to the SMTP server details.
8. Moreover, change the Authentication method from a normal password to OAuth2.
9. Finally, save the changes to resolve Thunderbird email not working with Office 365.

3. Try to Reconfigure Your Thunderbird Account

1. Firstly, run Thunderbird on your device.
2. Then, click on your Office 365 email address.
3. Now, choose the Email button under the Setup Another Email Account section.
4. Enter the correct email credentials and click on Continue.
5. Once done, click on the Configure manually option and share the mentioned details.
6. For Incoming (IMAP):
   Server: outlook.office365.com
   Port: 993
   Connection security: SSL/TLS
   Authentication: OAuth2
7. For Outgoing (SMTP):
   Server: smtp.office365.com
   Port: 587
   Connection security: STARTTLS
   Authentication: OAuth2
8. For POP3:
   Server: outlook.office365.com
   Port: 995
   Connection security: SSL/TLS
   Authentication: OAuth2
9. Finally, click on Done to save the changes and resolve the Thunderbird not working with Office 365 issue.

4. Cross-check the IPv6 Settings

1. Run Thunderbird on your device.
2. Click on the menu icon and choose Settings.
3. Then, from the left panel, select General.
4. Now, scroll down to the bottom of the page and click on the Config Editor button.
5. Next, click on the Show All option to see all the network preferences.
6. Once done, search and click on network.dns.disableIPv6.
7. Further, click on the arrow on the right to make it True.
8. Finally, restart Thunderbird, and the issue of Thunderbird and Office 365 will be solved.

Alternative Solution: Make sure to check the internet connection, corruption in Thunderbird, use App-password instead of regular password, and do not forget to cross-check the Firewall blacklisting.

Drawbacks of the Conventional Ways

• The user cannot depend on one solution, as it is more like a hit-and-trial method, which eventually frustrates the user.
• Also, they are very time-consuming and complex for non-tech individuals.
• Expecting immediate results from these methods is not advisable at all.
• There is always a high risk of data loss or alteration in these manual ways to fix Thunderbird stopped working with Office 365.

What Do Professionals Suggest?

Considering all the limitations and risks of using a manual way to resolve Thunderbird not working with Office 365, industry professionals always suggest taking a backup of data or simply switching to another email client. And, thus, for this, they always prefer and suggest the RecoveryTools Thunderbird File Converter Wizard. It is very easy to use and has 30+ saving options, which makes it a one-stop Thunderbird solution. The best thing about this tool is that it keeps all the attachments, folders, and elements intact or the same even after the conversion. Therefore, the quick steps to use this solution are:

1. Install and run the tool mentioned above.
   
2. Choose the Thunderbird data using the selection modes.
   
3. Select one export option such as PST, PDF, Gmail, Outlook, etc.
   
4. Now, give the saving location or credentials accordingly.
   
5. Finally, click on Convert to overcome the Thunderbird stopped functioning with Office 365 issue.
   

Features of Using the Pro Tool

• It has a demo edition, which is completely free of cost and lets the user test the software’s efficiency.
• The user can take the backup of Thunderbird data by simply convert Thunderbird to PST, MBOX, MSG, DOC, JPG, etc., or by export Thunderbird to Outlook, Gmail, Yahoo, etc. directly.
• The utility is completely safe, secure, and reliable as it protects the file from corruption, alteration, loss, or even from digital invaders such as a virus, malware, etc.
• To manage and access the output, there is a file-saving location option and a file-naming option in this software.
• It is very easy to use, has dual file-selection modes, and runs on all operating systems, making it a compatible solution.

Conclusion

In this blog post, we briefly shared multiple manual solutions to fix the Thunderbird is not authenticating with Office 365 issue. However, it is always recommended by the experts to first take a backup of Thunderbird data before following any indirect methods. Also, with this tool, users can easily switch email clients by transferring all their data from Thunderbird to any other platform. Overall, this is the best utility to save, download, export, transfer, or fix Thunderbird file data.

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