SamLookupDomainInSamServer - NtDoc

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

//
// Functions
//

/**
 * The SamLookupDomainInSamServer method obtains the SID of a domain, given the object's name.
 *
 * \param ServerHandle A handle representing a server.
 * \param Name A UTF-16 encoded string.
 * \param DomainId A SID value of a domain that corresponds to the Name.
 * \return NTSTATUS Successful or errant status.
 * \sa https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-samr/47492d59-e095-4398-b03e-8a062b989123
 */
NTSYSAPI
NTSTATUS
NTAPI
SamLookupDomainInSamServer(
    _In_ SAM_HANDLE ServerHandle,
    _In_ PCUNICODE_STRING Name,
    _Outptr_ PSID *DomainId
    );

#endif

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NtDoc

This function is a wrapper over an RPC method documented in the [MS-SAMR] specification.