What does HRESULT 0x80190191 (HTTP_E_STATUS_DENIED) mean?

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The server returned HTTP 401 Unauthorized and requires authentication.

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HTTP_E_STATUS_BAD_REQUEST	HTTP_E_STATUS_PAYMENT_REQ

HTTP_E_STATUS_DENIED

HTTP_E_STATUS_DENIED maps to HTTP 401 Unauthorized. Despite the historical reason phrase, this status means that the request lacks valid authentication credentials for the target resource.

Diagnostic discriminator: Record the WWW-Authenticate challenge and the credential actually sent. A request with valid credentials to the same resource distinguishes 401 authentication failure from 403 authorization denial and avoids treating the response as a connectivity problem.

What to check for HTTP_E_STATUS_DENIED

Inspect the WWW-Authenticate challenge to identify the authentication scheme the server accepts.
Verify token expiry, audience, issuer, clock skew, client certificate selection, or username/password credentials as appropriate.
Do not confuse 401 with 403: a valid identity can still lack authorization for the requested action.

RFC 9110: 401 Unauthorized

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