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WININET_E_INCORRECT_USER_NAME
WININET_E_INCORRECT_USER_NAME is a WinINet HRESULT. It means that the server, proxy, or authentication mechanism did not accept the supplied user name. The credential format may be wrong even when the account itself exists.
What to check
- Verify the account name format expected by the target, including any domain, realm or tenant component.
- Confirm that the request is authenticating to the intended server or proxy rather than to an unexpected redirect target.
- Avoid logging the user name together with secrets; record the authentication scheme and response status instead.
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