Set TLS/SSL security policy for IPP printers
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Windows 11 Version 24H2
Path in the GPO console
Computer Configuration\Administrative Templates\Printers Description
Determines the TLS/SSL security policy (WINHTTP_OPTION_SECURITY_FLAGS) for printers using the Microsoft IPP Class Driver. By default, security policy is set to ignore all certificate errors, allowing use of self-signed certificates for printers. If you enable this setting the system defaults to enabling all certificate checking, disallowing certificate errors. Specific certificate checking can be set with the given checkboxes. If you disable this setting or do not configure it, the default is to ignore all certificate errors (all checkboxes unchecked).
Registry
HKLM
Software\Policies\Microsoft\Windows NT\Printers\IPP MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/Printers/ConfigureIppTlsCertificatePolicy Microsoft Learn documentation Mapping data: Microsoft Learn (CC BY 4.0)
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. ⓘ
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Set TLS/SSL security policy for IPP printers
; State: Enabled
; Supported on: At least Windows 11 Version 24H2
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows NT\Printers\IPP]
"SecurityFlagsBlockUnknownCA"=dword:00000001
"SecurityFlagsBlockCertWrongUsage"=dword:00000001
"SecurityFlagsBlockCertCNInvalid"=dword:00000001
"SecurityFlagsBlockCertDateInvalid"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Set TLS/SSL security policy for IPP printers
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
$path = 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockUnknownCA' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockCertWrongUsage' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockCertCNInvalid' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockCertDateInvalid' -Value 1 -Type DWordIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/Printers/ConfigureIppTlsCertificatePolicy
Data type: String
Value:
<enabled/>
<data id="SecurityFlagsBlockUnknownCA" value="1"/>
<data id="SecurityFlagsBlockCertWrongUsage" value="1"/>
<data id="SecurityFlagsBlockCertCNInvalid" value="1"/>
<data id="SecurityFlagsBlockCertDateInvalid" value="1"/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Set TLS/SSL security policy for IPP printers
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP' -Name 'SecurityFlagsBlockUnknownCA' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP' -Name 'SecurityFlagsBlockCertWrongUsage' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP' -Name 'SecurityFlagsBlockCertCNInvalid' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP' -Name 'SecurityFlagsBlockCertDateInvalid' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Set TLS/SSL security policy for IPP printers
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
$path = 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockUnknownCA' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockCertWrongUsage' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockCertCNInvalid' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockCertDateInvalid' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Set TLS/SSL security policy for IPP printers
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
# 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: Set TLS/SSL security policy for IPP printers
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP' -Name 'SecurityFlagsBlockUnknownCA' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP' -Name 'SecurityFlagsBlockCertWrongUsage' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP' -Name 'SecurityFlagsBlockCertCNInvalid' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP' -Name 'SecurityFlagsBlockCertDateInvalid' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Set TLS/SSL security policy for IPP printers
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
$path = 'HKLM:\Software\Policies\Microsoft\Windows NT\Printers\IPP'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockUnknownCA' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockCertWrongUsage' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockCertCNInvalid' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'SecurityFlagsBlockCertDateInvalid' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.