In this post, you’ll learn more about the Error WS_E_PROXY_REQUIRES_DIGEST_AUTH – 0x803D0019 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
WS_E_PROXY_REQUIRES_DIGEST_AUTH – 0x803D0019
Win32 COM Error Error Description
The HTTP proxy server requires HTTP authentication scheme ‘digest’.