Access data sources across domains: registry value 1406 (Zones\3)UserHKCU\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3

Policy ID: IZ_PolicyAccessDataSourcesAcrossDomains_1
Scope: Computer Configuration, User Configuration
Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › Internet Explorer › Internet Control Panel › Security Page › Internet Zone

Registry

1406

REG_DWORDUserComputer

…\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3HKCU\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3 Current key
HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3

Enabled value: Depends on the option value
Element: Access data sources across domains

Options
Item	Stored value
Enable	0
Disable	3
Prompt	1

Apply with .reg · CMD · PowerShell

UserPer-account setting

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3]

; Options (use only one)
; Enable
"1406"=dword:00000000
; Disable
"1406"=dword:00000003
; Prompt
"1406"=dword:00000001

CMD

:: Options (use only one)

:: Enable
reg add "HKCU\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3" /v "1406" /t REG_DWORD /d 0 /f
:: Disable
reg add "HKCU\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3" /v "1406" /t REG_DWORD /d 3 /f
:: Prompt
reg add "HKCU\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3" /v "1406" /t REG_DWORD /d 1 /f

PowerShell

# Common: create the key
New-Item -Path 'HKCU:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3' -Force | Out-Null

# Options (use only one)
# Enable
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3' -Name '1406' -PropertyType DWord -Value 0 -Force | Out-Null
# Disable
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3' -Name '1406' -PropertyType DWord -Value 3 -Force | Out-Null
# Prompt
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3' -Name '1406' -PropertyType DWord -Value 1 -Force | Out-Null

ComputerMachine-wide setting

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3]

; Options (use only one)
; Enable
"1406"=dword:00000000
; Disable
"1406"=dword:00000003
; Prompt
"1406"=dword:00000001

CMD

:: Options (use only one)

:: Enable
reg add "HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3" /v "1406" /t REG_DWORD /d 0 /f
:: Disable
reg add "HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3" /v "1406" /t REG_DWORD /d 3 /f
:: Prompt
reg add "HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3" /v "1406" /t REG_DWORD /d 1 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3' -Force | Out-Null

# Options (use only one)
# Enable
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3' -Name '1406' -PropertyType DWord -Value 0 -Force | Out-Null
# Disable
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3' -Name '1406' -PropertyType DWord -Value 3 -Force | Out-Null
# Prompt
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3' -Name '1406' -PropertyType DWord -Value 1 -Force | Out-Null