When deploying aGlobal HTTP Proxy payload, the required field to enable automatic proxy configuration is theProxy type. Apple documentation specifies that administrators must set this field to either "Manual" or
"Auto." If "Auto" is selected, the device will automatically fetch and apply the proxy settings from a PAC (Proxy Auto-Configuration) file. While fields like URL or Port may be needed depending on the type, the fundamental requirement that determines how the proxy is applied is theProxy typeitself. Without this configuration, the device cannot distinguish between a manual or automatic proxy setup.
References:Apple Platform Deployment - "Global HTTP Proxy payload settings."