NetUserSetGroups function (lmaccess.h)

The NetUserSetGroups function sets global group memberships for a specified user account.


  [in] LPCWSTR servername,
  [in] LPCWSTR username,
  [in] DWORD   level,
  [in] LPBYTE  buf,
  [in] DWORD   num_entries


[in] servername

A pointer to a constant string that specifies the DNS or NetBIOS name of the remote server on which the function is to execute. If this parameter is NULL, the local computer is used.

[in] username

A pointer to a constant string that specifies the name of the user for which to set global group memberships. For more information, see the Remarks section.

[in] level

The information level of the data. This parameter can be one of the following values.

Value Meaning
The buf parameter points to an array of GROUP_USERS_INFO_0 structures that specifies global group names.
The buf parameter points to an array of GROUP_USERS_INFO_1 structures that specifies global group names with attributes.

[in] buf

A pointer to the buffer that specifies the data. For more information, see Network Management Function Buffers.

[in] num_entries

The number of entries contained in the array pointed to by the buf parameter.

Return value

If the function succeeds, the return value is NERR_Success.

If the function fails, the return value can be one of the following error codes.

Return code Description
The user does not have access to the requested information.
The system call level is not correct. This error is returned if the level parameter was specified as a value other than 0 or 1.
A parameter passed was not valid. This error is returned if the num_entries parameter was not valid.
Insufficient memory was available to complete the operation.
The computer name is invalid.
The operation is allowed only on the primary domain controller of the domain.
The group group name specified by the grui0_name in the GROUP_USERS_INFO_0 structure or grui1_name member in the GROUP_USERS_INFO_1 structure pointed to by the buf parameter does not exist.
An internal error occurred.
The user name could not be found.


If you are programming for Active Directory, you may be able to call certain Active Directory Service Interface (ADSI) methods to achieve the same functionality you can achieve by calling the network management user functions. For more information, see IADsUser and IADsComputer.

If you call this function on a domain controller that is running Active Directory, access is allowed or denied based on the access control list (ACL) for the securable object. The default ACL permits only Domain Admins and Account Operators to call this function. On a member server or workstation, only Administrators and Power Users can call this function. For more information, see Security Requirements for the Network Management Functions. For more information on ACLs, ACEs, and access tokens, see Access Control Model.

The security descriptor of the User object is used to perform the access check for this function.

To grant a user membership in one existing global group, you can call the NetGroupAddUser function.

User account names are limited to 20 characters and group names are limited to 256 characters. In addition, account names cannot be terminated by a period and they cannot include commas or any of the following printable characters: ", /, , [, ], :, |, <, >, +, =, ;, ?, *. Names also cannot include characters in the range 1-31, which are nonprintable.


The following code sample demonstrates how to set global group memberships for a user account with a call to the NetUserSetGroups function. The code sample fills in the grui0_name member of the GROUP_USERS_INFO_0 structure and calls NetUserSetGroups, specifying information level 0.

#ifndef UNICODE
#define UNICODE
#pragma comment(lib, "netapi32.lib")

#include <stdio.h>
#include <windows.h> 
#include <lm.h>

int wmain(int argc, wchar_t *argv[])
   DWORD dwLevel = 0;
   NET_API_STATUS nStatus;

   if (argc != 4)
      fwprintf(stderr, L"Usage: %s \\\\ServerName UserName GroupName\n", argv[0]);
   // Fill in the GROUP_USERS_INFO_0 structure member.
   gi.grui0_name = argv[3];
   // Call the NetUserSetGroups function; specify level 0.
   nStatus = NetUserSetGroups(argv[1],
   // If the call succeeds, inform the user.
   if (nStatus == NERR_Success)
      fwprintf(stderr, L"Group membership has been successful for %s\n", argv[2]);
   // Otherwise, print the system error.
      fprintf(stderr, "A system error has occurred: %d\n", nStatus);

   return 0;


Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header lmaccess.h (include Lm.h)
Library Netapi32.lib
DLL Netapi32.dll

See also





Network Management Functions

Network Management Overview

User Functions