Configure Cross Folder Content in conversation view: registry value crossfoldercontentUserHKCU\software\policies\microsoft\office\16.0\outlook\options\conversations

Policy ID: L_ConfigureCrossFolderContentInConversationView
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

Registry

crossfoldercontent

REG_DWORDUser

HKCU\software\policies\microsoft\office\16.0\outlook\options\conversations Current key

Enabled value: Depends on the option value
Element: -

Options
Item	Stored value
On and cross-store (default)	0
Off	1
On and current	2
On and local	3

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\conversations]

; Options (use only one)
; On and cross-store (default)
"crossfoldercontent"=dword:00000000
; Off
"crossfoldercontent"=dword:00000001
; On and current
"crossfoldercontent"=dword:00000002
; On and local
"crossfoldercontent"=dword:00000003

CMD

:: Options (use only one)

:: On and cross-store (default)
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\options\conversations" /v "crossfoldercontent" /t REG_DWORD /d 0 /f
:: Off
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\options\conversations" /v "crossfoldercontent" /t REG_DWORD /d 1 /f
:: On and current
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\options\conversations" /v "crossfoldercontent" /t REG_DWORD /d 2 /f
:: On and local
reg add "HKCU\software\policies\microsoft\office\16.0\outlook\options\conversations" /v "crossfoldercontent" /t REG_DWORD /d 3 /f

PowerShell

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

# Options (use only one)
# On and cross-store (default)
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\options\conversations' -Name 'crossfoldercontent' -PropertyType DWord -Value 0 -Force | Out-Null
# Off
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\options\conversations' -Name 'crossfoldercontent' -PropertyType DWord -Value 1 -Force | Out-Null
# On and current
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\options\conversations' -Name 'crossfoldercontent' -PropertyType DWord -Value 2 -Force | Out-Null
# On and local
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\outlook\options\conversations' -Name 'crossfoldercontent' -PropertyType DWord -Value 3 -Force | Out-Null