Client will block connection to untrusted SSL certificates (Recommendation Setting)
Zoom 5.17.5
Supported on: Microsoft Windows XP SP2 or later
Description
Default policy is true. If this policy is true, client will show a warning dialog when connecting to untrusted SSL certificates, and there is no Trust button to allow user to bypass and continue. If this setting is false, client will show a warning dialog when connecting to untrusted SSL certificates, but there is a Trust button to allow user to bypass and continue. If this policy is not set, client use will default policy.
Registry
HKCU
Software\Policies\Zoom\Zoom Meetings\Recommended\General Value name: BlockUntrustedSSLCert
Enabled: BlockUntrustedSSLCert = 1
Disabled: BlockUntrustedSSLCert = 0
REG Builder
BETAConfigure the state and elements to generate .reg, PowerShell, Intune, and SCCM outputs.
These exports replicate the policy's registry effect. Editing the registry directly is not the same as applying the GPO through the management console (no gpupdate, no central reporting). Test before production; HKLM changes require administrator rights.
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Client will block connection to untrusted SSL certificates (Recommendation Setting)
; State: Enabled
; Supported on: Microsoft Windows XP SP2 or later
[HKEY_CURRENT_USER\Software\Policies\Zoom\Zoom Meetings\Recommended\General]
"BlockUntrustedSSLCert"=dword:00000001PowerShell
# Exported from gporais.com
# Policy: Client will block connection to untrusted SSL certificates (Recommendation Setting)
# State: Enabled
# Supported on: Microsoft Windows XP SP2 or later
$path = 'HKCU:\Software\Policies\Zoom\Zoom Meetings\Recommended\General'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'BlockUntrustedSSLCert' -Value 1 -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: Client will block connection to untrusted SSL certificates (Recommendation Setting)
# State: Enabled
# Supported on: Microsoft Windows XP SP2 or later
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
}
$checks = @(
(Test-RegistryValue -Path 'HKCU:\Software\Policies\Zoom\Zoom Meetings\Recommended\General' -Name 'BlockUntrustedSSLCert' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Client will block connection to untrusted SSL certificates (Recommendation Setting)
# State: Enabled
# Supported on: Microsoft Windows XP SP2 or later
$path = 'HKCU:\Software\Policies\Zoom\Zoom Meetings\Recommended\General'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'BlockUntrustedSSLCert' -Value 1 -Type DWordSCCM CI
# Exported from gporais.com
# Policy: Client will block connection to untrusted SSL certificates (Recommendation Setting)
# State: Enabled
# Supported on: Microsoft Windows XP SP2 or later
# 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: Client will block connection to untrusted SSL certificates (Recommendation Setting)
# State: Enabled
# Supported on: Microsoft Windows XP SP2 or later
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
}
$checks = @(
(Test-RegistryValue -Path 'HKCU:\Software\Policies\Zoom\Zoom Meetings\Recommended\General' -Name 'BlockUntrustedSSLCert' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Client will block connection to untrusted SSL certificates (Recommendation Setting)
# State: Enabled
# Supported on: Microsoft Windows XP SP2 or later
$path = 'HKCU:\Software\Policies\Zoom\Zoom Meetings\Recommended\General'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'BlockUntrustedSSLCert' -Value 1 -Type DWord