Outlook
A Microsoft application for managing email, calendars, contacts, and tasks across devices and platforms.
"user is authenticated but not connected" when connecting to Outlook Office365 from Thunderbird via IMAP and OAuth2
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(54.400000000000006, 93%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EFK%3C/text%3E%3C/svg%3E)
Filip Kurowski
5
Reputation points
When connecting to Outlook Office365 from Thunderbird via IMAP and OAuth2 I get the reply "user is authenticated but not connected". Every now and then it works, but just like 30% of time ... Why and how to repair this?
Thanks in advance for any suggestions!
Outlook
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 45%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKS%3C/text%3E%3C/svg%3E)
Ken S 0 Reputation points2025-12-06T04:51:07.8133333+00:00 Same issue. It worked all the time until I had to reinstall windows and Thunderbird. It wont get any emails from Hotmail account. May have to use Thunderbird for Gmail and Outlook for Hotmail.
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