PROCESS_MITIGATION_USER_POINTER_AUTH_POLICY - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTPSAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)
#if !defined(NTDDI_WIN10_NI) || (NTDDI_VERSION < NTDDI_WIN10_NI)

typedef struct _PROCESS_MITIGATION_USER_POINTER_AUTH_POLICY {
    union {
        ULONG Flags;
        struct {
            ULONG EnablePointerAuthUserIp : 1;
            ULONG ReservedFlags : 31;
        };
    };
} PROCESS_MITIGATION_USER_POINTER_AUTH_POLICY, *PPROCESS_MITIGATION_USER_POINTER_AUTH_POLICY;

#endif
#endif
#endif

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This structure is documented in Windows Driver Kit.