![Mozilla Thunderbird email client pairs well with Firefox - 4 enterprise email clients to consider instead of Outlook Mozilla Thunderbird email client pairs well with Firefox - 4 enterprise email clients to consider instead of Outlook](https://www.techtarget.com/rms/onlineImages/enterprisedesktop_emails_02.png)
Mozilla Thunderbird email client pairs well with Firefox - 4 enterprise email clients to consider instead of Outlook
![User is authenticated but not connected" when trying to use ThunderBird as mail client access office365 - Microsoft Q&A User is authenticated but not connected" when trying to use ThunderBird as mail client access office365 - Microsoft Q&A](https://docs.microsoft.com/answers/storage/attachments/196789-64.png)
User is authenticated but not connected" when trying to use ThunderBird as mail client access office365 - Microsoft Q&A
![User is authenticated but not connected" when trying to use ThunderBird as mail client access office365 - Microsoft Q&A User is authenticated but not connected" when trying to use ThunderBird as mail client access office365 - Microsoft Q&A](https://docs.microsoft.com/answers/storage/attachments/194187-52.png)
User is authenticated but not connected" when trying to use ThunderBird as mail client access office365 - Microsoft Q&A
![Microsoft is going to disable basic/legacy authentication for Exchange Online. What does that actually mean and does that impact me? | Modern Workplace Blog Microsoft is going to disable basic/legacy authentication for Exchange Online. What does that actually mean and does that impact me? | Modern Workplace Blog](https://i0.wp.com/www.vansurksum.com/wp-content/uploads/2020/03/Modern-8.png?fit=1061%2C784&ssl=1)