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Outlook Error 0x800CCC90 / 0x900CCC92
These errors indicate that Outlook is unable to authenticate with the incoming mail server. The password or username is being rejected.
How to Fix
- Verify your password: Test your login at
https://yourdomain.com/webmail. If it works in webmail, the password is correct and the issue is in your Outlook configuration. - Use the full email address as username: Enter
user@yourdomain.com, not just the username portion. - Disable SPA: Go to Account Settings > More Settings > Security and uncheck "Log on using Secure Password Authentication (SPA)." Our servers use standard password authentication, not SPA.
- Check for IP block: If you entered the wrong password several times, your IP may be blocked. Unblock it at my.ultrawebhosting.com.
For complete Outlook setup instructions, see our article on How to Set Up Email in Microsoft Outlook.
