Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
Open

Exchange - Add-on required --> log-in not possible

Thunderbird Extensions
Wayne Mery replied
andreas.bart
andreas.bart

Dear Support,

we can not log-in with our office 365 account. We need to log-in with "Exchange Add-on erforderlich", but we receive this error message.

I attached you some screenshots. We do not understand why this error appears.

When we log-in with option "Exchange" then it works but we need the other option because we need to have the sub-folders.

Please help us.

Best regards, Andreas

Dear Support, we can not log-in with our office 365 account. We need to log-in with "Exchange Add-on erforderlich", but we receive this error message. I attached you some screenshots. We do not understand why this error appears. When we log-in with option "Exchange" then it works but we need the other option because we need to have the sub-folders. Please help us. Best regards, Andreas
Attached screenshots

Modified by andreas.bart

All Replies (1)

Wayne Mery
Wayne Mery
  • Top 25 Contributor
  • Moderator

The believe the error is related to using OWL. You should contact the author of the add-on.

Ask a question

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.