Configure form regions permissions: registry value disableformregionsUserHKCU\software\policies\microsoft\office\16.0\outlook\addins

Policy ID: L_Disableformregions
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 › Form Region Settings

Registry

disableformregions

REG_DWORDUser

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

Enabled value: Depends on the option value
Element: Configure form regions permissions:

Options
Item	Stored value
All form regions are allowed to run	0
Allow only those registered in HKLM	1
No form regions are allowed to run	2

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

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

; Options (use only one)
; All form regions are allowed to run
"disableformregions"=dword:00000000
; Allow only those registered in HKLM
"disableformregions"=dword:00000001
; No form regions are allowed to run
"disableformregions"=dword:00000002

CMD

:: Options (use only one)

:: All form regions are allowed to run
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\addins" /v "disableformregions" /t REG_DWORD /d 0 /f
:: Allow only those registered in HKLM
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\addins" /v "disableformregions" /t REG_DWORD /d 1 /f
:: No form regions are allowed to run
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\addins" /v "disableformregions" /t REG_DWORD /d 2 /f

PowerShell

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

# Options (use only one)
# All form regions are allowed to run
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\addins' -Name 'disableformregions' -PropertyType DWord -Value 0 -Force | Out-Null
# Allow only those registered in HKLM
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\addins' -Name 'disableformregions' -PropertyType DWord -Value 1 -Force | Out-Null
# No form regions are allowed to run
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\addins' -Name 'disableformregions' -PropertyType DWord -Value 2 -Force | Out-Null