Outlook (Windows) - one IMAP account permanently stuck on "Waiting for your email provider"

Hi Kočica, Sinja

Please note that our forum is a public platform, and we will modify your question to hide your personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data.

I understand how frustrating this situation must be, especially since the mailbox works normally in Outlook Mobile, Outlook Classic, and Thunderbird.

Based on the troubleshooting you've already completed, the IMAP/SMTP settings and credentials appear to be correct. Since other mailboxes on the same server can be added to New Outlook without any issues, the problem may be related to an account-specific issue within New Outlook rather than the mail server or network configuration itself.

If the affected account is currently listed in New Outlook, please go to Settings > Accounts > Your accounts, select the account, choose Manage, and then click Remove from all devices. After that, restart your computer and try adding the account again.
Please note that this is a user-to-user support forum. Moderators, contributors including external Microsoft employees cannot directly intervene in Microsoft product features or access back-end systems. Our role is limited to providing technical guidance on reported issues, requests, or ideas only.

If the issue persists, I recommend contacting Microsoft Support for further investigation, as they may be able to check whether there is an issue with the account's provisioning or synchronization in New Outlook.

In the meantime, you may continue using Outlook Classic or Thunderbird as a temporary workaround, since both clients are able to connect to the mailbox successfully.

Thank you for your understanding. 

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