Specify encryption compatibility: registry value compatmode (powerpoint\security\crypto)UserHKCU\software\policies\microsoft\office\16.0\powerpoint\security\crypto

Policy ID: L_SpecifyEncryptionCompatibility
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 › Cryptography

Registry

compatmode

REG_DWORDUser

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

Enabled value: Depends on the option value
Element: -

Options
Item	Stored value
Use legacy format	0
Use next generation format	1
All files save with next generation	2

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

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

; Options (use only one)
; Use legacy format
"compatmode"=dword:00000000
; Use next generation format
"compatmode"=dword:00000001
; All files save with next generation
"compatmode"=dword:00000002

CMD

:: Options (use only one)

:: Use legacy format
reg add "HKCU\software\policies\microsoft\office\16.0\powerpoint\security\crypto" /v "compatmode" /t REG_DWORD /d 0 /f
:: Use next generation format
reg add "HKCU\software\policies\microsoft\office\16.0\powerpoint\security\crypto" /v "compatmode" /t REG_DWORD /d 1 /f
:: All files save with next generation
reg add "HKCU\software\policies\microsoft\office\16.0\powerpoint\security\crypto" /v "compatmode" /t REG_DWORD /d 2 /f

PowerShell

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

# Options (use only one)
# Use legacy format
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\powerpoint\security\crypto' -Name 'compatmode' -PropertyType DWord -Value 0 -Force | Out-Null
# Use next generation format
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\powerpoint\security\crypto' -Name 'compatmode' -PropertyType DWord -Value 1 -Force | Out-Null
# All files save with next generation
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\powerpoint\security\crypto' -Name 'compatmode' -PropertyType DWord -Value 2 -Force | Out-Null