Hi @RaoBO
Please kindly note that current Microsoft Q&A forum only supports posting in English.
For us to better understand your question, please edit the question into English.
Thanks for your understanding.
According to machine translation, your question is:
I have a problem with this Exchange email account on Outlook 2021 Pro and Windows 11 (email account on OVH), every time this pop-up appears and asks for a password. I can receive and send emails, but the pop-up in the image below persists. Do you have any idea how I can solve this problem?
If there is any misunderstanding, please feel free to point out.
It seems the image mentioned in your comment wasn't uploaded successfully.
Is the pop-up window like:
If yes, please have a check in Credential Manager if there are cached credentials for Outlook.
If there are, remove these caches and see if it helps with this issue.
Besides, please also try re-creating a new Outlook profile.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.