Issues Connecting Plesk & Cloud Email Accounts to New Outlook for Windows

Incident Report for Rebel

Identified

Identified Issue (External to Our Services):
We are aware of an issue affecting some customers who use Plesk Email Hosting and Cloud Email Hosting when connecting their existing email accounts to the New Outlook for Windows application.

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Important:
Our email servers and services are operating normally.
The issue appears to be related to Microsoft’s New Outlook for Windows app and how it handles IMAP/POP authentication for certain existing accounts.

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What Customers Are Seeing:
Some users receive error messages such as:
“Something went wrong, try again.”
“You may need an app password.”

These errors occur even when the correct password is used and meet the updated security requirements.


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What We Have Verified:
- Our email platforms (Plesk and Cloud Email) are functioning normally.No server-side errors or authentication failures are occurring.

- Newly created email accounts connect to New Outlook successfully.Existing accounts fail specifically within the New Outlook interface.

- Switching to Classic Outlook resolves the issue immediately.


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Temporary Workaround:
To continue using email without interruption, customers can switch Outlook back to the Classic Outlook interface:

https://www.howtogeek.com/how-to-swap-between-outlook-classic-and-new-outlook/
https://office-watch.com/2025/how-to-switch-back-to-classic-outlook-from-new-outlook/


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Impact:
This issue is limited to the New Outlook for Windows app.

Email continues to work normally on our servers and through Classic Outlook and other email clients.


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Next Update:
We are monitoring the situation and will provide updates if Microsoft releases an adjustment or clarification regarding New Outlook’s authentication behavior.

Thank you for your understanding.

~ The Rebel Team
Posted Nov 26, 2025 - 11:18 EST