Enable default legacy SameSite cookie behavior setting (obsolete): registry value LegacySameSiteCookieBehaviorEnabledComputerHKLM\Software\Policies\Microsoft\Edge

Policy ID: LegacySameSiteCookieBehaviorEnabled
Scope: Computer Configuration, User Configuration
Supported on: Microsoft Edge version 80-94, Windows 7 or later
Source: Microsoft Edge Policy Templates (version 155.0.4283.45)
Category: Microsoft Edge › Content settings

Registry

LegacySameSiteCookieBehaviorEnabled

REG_DWORDComputerUser

…\Software\Policies\Microsoft\EdgeHKLM\Software\Policies\Microsoft\Edge Current key
HKCU\Software\Policies\Microsoft\Edge

Enabled value: Depends on the option value
Element: Enable default legacy SameSite cookie behavior setting

Options
Item	Stored value
Revert to legacy SameSite behavior for cookies on all sites	1
Use SameSite-by-default behavior for cookies on all sites	2

Apply with .reg · CMD · PowerShell

ComputerMachine-wide setting

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge]

; Options (use only one)
; Revert to legacy SameSite behavior for cookies on all sites
"LegacySameSiteCookieBehaviorEnabled"=dword:00000001
; Use SameSite-by-default behavior for cookies on all sites
"LegacySameSiteCookieBehaviorEnabled"=dword:00000002

CMD

:: Options (use only one)

:: Revert to legacy SameSite behavior for cookies on all sites
reg add "HKLM\Software\Policies\Microsoft\Edge" /v "LegacySameSiteCookieBehaviorEnabled" /t REG_DWORD /d 1 /f
:: Use SameSite-by-default behavior for cookies on all sites
reg add "HKLM\Software\Policies\Microsoft\Edge" /v "LegacySameSiteCookieBehaviorEnabled" /t REG_DWORD /d 2 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Force | Out-Null

# Options (use only one)
# Revert to legacy SameSite behavior for cookies on all sites
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'LegacySameSiteCookieBehaviorEnabled' -PropertyType DWord -Value 1 -Force | Out-Null
# Use SameSite-by-default behavior for cookies on all sites
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'LegacySameSiteCookieBehaviorEnabled' -PropertyType DWord -Value 2 -Force | Out-Null

UserPer-account setting

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Edge]

; Options (use only one)
; Revert to legacy SameSite behavior for cookies on all sites
"LegacySameSiteCookieBehaviorEnabled"=dword:00000001
; Use SameSite-by-default behavior for cookies on all sites
"LegacySameSiteCookieBehaviorEnabled"=dword:00000002

CMD

:: Options (use only one)

:: Revert to legacy SameSite behavior for cookies on all sites
reg add "HKCU\Software\Policies\Microsoft\Edge" /v "LegacySameSiteCookieBehaviorEnabled" /t REG_DWORD /d 1 /f
:: Use SameSite-by-default behavior for cookies on all sites
reg add "HKCU\Software\Policies\Microsoft\Edge" /v "LegacySameSiteCookieBehaviorEnabled" /t REG_DWORD /d 2 /f

PowerShell

# Common: create the key
New-Item -Path 'HKCU:\Software\Policies\Microsoft\Edge' -Force | Out-Null

# Options (use only one)
# Revert to legacy SameSite behavior for cookies on all sites
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Edge' -Name 'LegacySameSiteCookieBehaviorEnabled' -PropertyType DWord -Value 1 -Force | Out-Null
# Use SameSite-by-default behavior for cookies on all sites
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Edge' -Name 'LegacySameSiteCookieBehaviorEnabled' -PropertyType DWord -Value 2 -Force | Out-Null