Automatically trust sites for Win OS security zones
Verified with Adobe Acrobat Reader — updated on September 2, 2026
Supported on: Undefined
Path in the GPO console
User Configuration\Administrative Templates\Adobe Acrobat Reader DC\Preferences\Security\TrustManager Description
Elevates locations that Internet Explorer trusts to privileged locations so that they may bypass security restrictions. Prior to 10.1.1 and 9.4.7, trust was granted to Trusted Sites. With 10.1.2 and 9.5 and later, trust also includes Local Intranet zones. This setting essentially makes IE trust operate as if they were privileged locations. The feature can be disabled with bDisableOSTrustedSites. 0: Don't automatically trust Windows OS zones. 1: Do automatically trust Windows OS zones. GUI mapping: Edit > Preferences > Security (Enhanced) > Automatically trust sites for my Win OS security zones
Registry
HKCU
Software\Adobe\Acrobat Reader\DC\TrustManager Value name: bTrustOSTrustedSites
Enabled: bTrustOSTrustedSites = 1
Disabled: bTrustOSTrustedSites = 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: Automatically trust sites for Win OS security zones
; State: Enabled
; Supported on: Undefined
[HKEY_CURRENT_USER\Software\Adobe\Acrobat Reader\DC\TrustManager]
"bTrustOSTrustedSites"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Automatically trust sites for Win OS security zones
# State: Enabled
# Supported on: Undefined
# Warning: In SYSTEM context (the Intune default), HKCU targets the SYSTEM profile. Run this script using the logged-on credentials.
$path = 'HKCU:\Software\Adobe\Acrobat Reader\DC\TrustManager'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'bTrustOSTrustedSites' -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: Automatically trust sites for Win OS security zones
# State: Enabled
# Supported on: Undefined
# Warning: In SYSTEM context (the Intune default), HKCU targets the SYSTEM profile. Run this script using the logged-on credentials.
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
}
$checks = @(
(Test-RegistryValue -Path 'HKCU:\Software\Adobe\Acrobat Reader\DC\TrustManager' -Name 'bTrustOSTrustedSites' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Automatically trust sites for Win OS security zones
# State: Enabled
# Supported on: Undefined
# Warning: In SYSTEM context (the Intune default), HKCU targets the SYSTEM profile. Run this script using the logged-on credentials.
$path = 'HKCU:\Software\Adobe\Acrobat Reader\DC\TrustManager'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'bTrustOSTrustedSites' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Automatically trust sites for Win OS security zones
# State: Enabled
# Supported on: Undefined
# 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: Automatically trust sites for Win OS security zones
# State: Enabled
# Supported on: Undefined
# Warning: In SYSTEM context (the Intune default), HKCU targets the SYSTEM profile. Run this script using the logged-on credentials.
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
}
$checks = @(
(Test-RegistryValue -Path 'HKCU:\Software\Adobe\Acrobat Reader\DC\TrustManager' -Name 'bTrustOSTrustedSites' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Automatically trust sites for Win OS security zones
# State: Enabled
# Supported on: Undefined
# Warning: In SYSTEM context (the Intune default), HKCU targets the SYSTEM profile. Run this script using the logged-on credentials.
$path = 'HKCU:\Software\Adobe\Acrobat Reader\DC\TrustManager'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'bTrustOSTrustedSites' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.