Security setting for macros: registry value levelUserHKCU\software\policies\microsoft\office\16.0\outlook\security

Policy ID: L_SecurityLevelOutlook
Scope: User Configuration
Supported on: At least Windows Server 2008 R2 or Windows 7
Source: Microsoft 365 Apps / Office Administrative Templates (version 5568.1000)
Category: Microsoft Outlook 2016 › Security › Trust Center

Registry

level

REG_DWORDUser

HKCU\software\policies\microsoft\office\16.0\outlook\security Current key

Enabled value: Depends on the option value
Element: Security Level

Options
Item	Stored value
Always warn	2
Never warn, disable all	4
Warn for signed, disable unsigned	3
No security check	1

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\security]

; Options (use only one)
; Always warn
"level"=dword:00000002
; Never warn, disable all
"level"=dword:00000004
; Warn for signed, disable unsigned
"level"=dword:00000003
; No security check
"level"=dword:00000001

CMD

:: Options (use only one)

:: Always warn
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\security" /v "level" /t REG_DWORD /d 2 /f
:: Never warn, disable all
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\security" /v "level" /t REG_DWORD /d 4 /f
:: Warn for signed, disable unsigned
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\security" /v "level" /t REG_DWORD /d 3 /f
:: No security check
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\security" /v "level" /t REG_DWORD /d 1 /f

PowerShell

# Common: create the key
New-Item -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\security' -Force | Out-Null

# Options (use only one)
# Always warn
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\security' -Name 'level' -PropertyType DWord -Value 2 -Force | Out-Null
# Never warn, disable all
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\security' -Name 'level' -PropertyType DWord -Value 4 -Force | Out-Null
# Warn for signed, disable unsigned
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\security' -Name 'level' -PropertyType DWord -Value 3 -Force | Out-Null
# No security check
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\security' -Name 'level' -PropertyType DWord -Value 1 -Force | Out-Null