HRESULT 0x800C0009 (INET_E_AUTHENTICATION

Status / error code:

Category:

Constant name:

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Operating System:

Description:

Authentication is required to access the object.

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INET_E_DOWNLOAD_FAILURE	INET_E_NO_VALID_MEDIA

INET_E_AUTHENTICATION_REQUIRED

INET_E_AUTHENTICATION_REQUIRED is a URL Moniker HRESULT. It means that the target resource requires credentials or another authentication step before it can be opened. The server or proxy may have returned an authentication challenge, or the protocol handler may require a credential UI.

What to check

Inspect the HTTP status and authentication challenge to identify the required scheme and realm.
Verify that the application supplies credentials through the supported mechanism and does not expose secrets in logs.
Confirm whether the requested account is authorized for the target resource after authentication succeeds.

Microsoft documentation

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