RtlFreeSid - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
#ifndef _NTRTL_H

NTSYSAPI
PVOID
NTAPI
RtlFreeSid(
    _In_ _Post_invalid_ PSID Sid
    );

#endif

View code on GitHub
// ntifs.h

NTSYSAPI PVOID RtlFreeSid(
  PSID Sid
);
View the official Windows Driver Kit DDI reference

NtDoc

This function is documented in Windows Driver Kit.

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Windows Driver Kit DDI reference (nf-ntifs-rtlfreesid)

RtlFreeSid function

Description

The RtlFreeSid routine is reserved for system use.

Parameters

Sid

Reserved.

Return value

Reserved.

View the official Windows Driver Kit DDI reference

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