Do not open files from the internet zone in Protected View: registry value disableinternetfilesinpv (powerpoint\security\protectedview)UserHKCU\software\policies\microsoft\office\16.0\powerpoint\security\protectedview

Policy ID: L_DoNotOpenFilesFromTheInternetZoneInProtectedView
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 PowerPoint 2016 › PowerPoint Options › Security › Trust Center › Protected View

Registry

disableinternetfilesinpv

REG_DWORDUser

HKCU\software\policies\microsoft\office\16.0\powerpoint\security\protectedview Current key

Enabled value: 1
Disabled value: 0

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\powerpoint\security\protectedview]

; Options (use only one)
; Enabled
"disableinternetfilesinpv"=dword:00000001
; Disabled
"disableinternetfilesinpv"=dword:00000000

CMD

:: Options (use only one)

:: Enabled
reg add "HKCU\software\policies\microsoft\office\16.0\powerpoint\security\protectedview" /v "disableinternetfilesinpv" /t REG_DWORD /d 1 /f
:: Disabled
reg add "HKCU\software\policies\microsoft\office\16.0\powerpoint\security\protectedview" /v "disableinternetfilesinpv" /t REG_DWORD /d 0 /f

PowerShell

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

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\powerpoint\security\protectedview' -Name 'disableinternetfilesinpv' -PropertyType DWord -Value 1 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\powerpoint\security\protectedview' -Name 'disableinternetfilesinpv' -PropertyType DWord -Value 0 -Force | Out-Null