What does HRESULT 0x80072F0D (WININET_E_INVALID_CA) mean?

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The certificate authority is invalid or not trusted.

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WININET_E_CLIENT_AUTH_CERT_NEEDED	WININET_E_CLIENT_AUTH_NOT_SETUP

WININET_E_INVALID_CA

WININET_E_INVALID_CA is a WinINet HRESULT. It means that WinINet could not validate the certificate authority for the secure connection. The certificate chain may be incomplete, untrusted, expired, intercepted by a proxy, or issued for the wrong trust environment.

What to check

Inspect the server certificate chain, issuing authority, validity dates and intended hostname.
Install or renew the correct trusted root only through approved system or enterprise certificate management.
Do not bypass certificate validation in production; check whether a TLS-inspecting proxy requires a managed enterprise root certificate.

Microsoft: WinINet overview

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