Apply WinHTTP Advanced Proxy JSON at the Intended Scope

Use set advproxy settings-file with user or machine scope, and inspect that advanced policy rather than assuming a browser consumes it.

On a Windows installation exposing the advanced WinHTTP commands, save an intended fixed-user policy in winhttp-proxy.json:

{
  "Proxy": "proxy.example:8080",
  "ProxyBypass": "localhost;*.internal.example",
  "AutoconfigUrl": "",
  "AutoDetect": false
}

Apply that file at the chosen scope:

netsh winhttp set advproxy setting-scope=user settings-file=winhttp-proxy.json

Use the actual file and account. If this fixed policy is intended for permitted public-site requests, the HTTP proxy list supplies HTTP host and port candidates for Proxy; retain the required bypass rules. machine selects a different scope; it does not mean the current user's setting. The advanced fields can instead describe PAC or automatic discovery when that is the intended policy.

Inspect with show advproxy. The older fixed-proxy commands are another interface, so finding a setting there does not establish which policy the app uses.

This configures WinHTTP. A browser-specific policy, explicit application proxy or another networking stack may choose differently. Match the effective account and consuming client when checking the result.

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