Set importance: registry value importanceUserHKCU\software\policies\microsoft\office\16.0\outlook\preferences

Policy ID: L_Setimportance
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 › Outlook Options › Preferences › E-mail Options › Advanced E-mail Options › When sending a message

Registry

importance

REG_DWORDUser

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

Enabled value: Depends on the option value
Element: Set importance:

Options
Item	Stored value
High	2
Normal	1
Low	0

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

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

; Options (use only one)
; High
"importance"=dword:00000002
; Normal
"importance"=dword:00000001
; Low
"importance"=dword:00000000

CMD

:: Options (use only one)

:: High
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\preferences" /v "importance" /t REG_DWORD /d 2 /f
:: Normal
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\preferences" /v "importance" /t REG_DWORD /d 1 /f
:: Low
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\preferences" /v "importance" /t REG_DWORD /d 0 /f

PowerShell

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

# Options (use only one)
# High
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\preferences' -Name 'importance' -PropertyType DWord -Value 2 -Force | Out-Null
# Normal
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\preferences' -Name 'importance' -PropertyType DWord -Value 1 -Force | Out-Null
# Low
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\preferences' -Name 'importance' -PropertyType DWord -Value 0 -Force | Out-Null