Hello,
It seems like the error message is related to accessing a specific webpage for login. Since you have already checked the Configure Web Sign In Allowed URLs in Microsoft Intune and confirmed that the policy has been successfully applied to the device, the issue might be related to the specific URL being blocked or restricted. To troubleshoot this issue further, you can try the following steps:
- Check if there are any firewall or network restrictions that might be blocking access to the URL.
- Verify if the URL https://login.microsoftonline.com/WebApp/WindowsLogon/1 is added to the allowed list in any security software or firewall settings.
- Ensure that the device has a stable internet connection and can access other websites without any issues.
- Try accessing the URL from a different browser or device to see if the issue persists
If the Answer is helpful, please click "Accept Answer" and upvote it.