Network security: LDAP client signing requirements
Verified with Windows Security Options 25H2 — updated on July 13, 2026
Security policy
This is a Security Options policy (Windows Settings > Security Settings), applied by the security engine — not an Administrative Template (ADMX). In GPMC/gpedit it is configured under Local Policies > Security Options.
Path in the GPO console
Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Network security Description
This setting controls whether the Windows LDAP client negotiates or requires signing. The default is Negotiate signing. Requiring signing protects LDAP integrity and resists tampering, but fails against servers that cannot provide signed sessions.
Registry
HKLM
System\CurrentControlSet\Services\LDAP Value name: LDAPClientIntegrity
Export Builder
BETAConfigure the state, scope and options, then generate .reg, PowerShell, Intune and SCCM outputs — or add the setting to a multi-setting collection.
These exports write the registry — this is not a managed GPO. ⓘ
Security policy setting: a domain GPO (Security Settings) can overwrite this registry value at the next policy refresh. Prefer configuring it via GPMC > Security Options.
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Network security: LDAP client signing requirements
; State: Enabled
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LDAP]
"LDAPClientIntegrity"=dword:00000001
"LDAPClientIntegrity"=dword:00000000More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Network security: LDAP client signing requirements
# State: Enabled
$path = 'HKLM:\System\CurrentControlSet\Services\LDAP'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'LDAPClientIntegrity' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'LDAPClientIntegrity' -Value 0 -Type DWordIntune XML
No direct Policy CSP / OMA-URI mapping for this policy. Use the Intune Remediation tab, or ingest the ADMX in Intune.Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Network security: LDAP client signing requirements
# State: Enabled
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\System\CurrentControlSet\Services\LDAP' -Name 'LDAPClientIntegrity' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\System\CurrentControlSet\Services\LDAP' -Name 'LDAPClientIntegrity' -Expected 0 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Network security: LDAP client signing requirements
# State: Enabled
$path = 'HKLM:\System\CurrentControlSet\Services\LDAP'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'LDAPClientIntegrity' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'LDAPClientIntegrity' -Value 0 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Network security: LDAP client signing requirements
# State: Enabled
# SCCM Configuration Item guidance:
# Create a Configuration Item of type "Setting: Script".
# Discovery script: use the Detection script below.
# Remediation script: use the Remediation script below.
# Compliance rule: the Discovery script output equals 'Compliant'.
# === Detection script ===
# Exported from gporais.com
# Policy: Network security: LDAP client signing requirements
# State: Enabled
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\System\CurrentControlSet\Services\LDAP' -Name 'LDAPClientIntegrity' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\System\CurrentControlSet\Services\LDAP' -Name 'LDAPClientIntegrity' -Expected 0 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Network security: LDAP client signing requirements
# State: Enabled
$path = 'HKLM:\System\CurrentControlSet\Services\LDAP'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'LDAPClientIntegrity' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'LDAPClientIntegrity' -Value 0 -Type DWord