Enable P2P while the device connects via VPN: registry value DOAllowVPNPeerCachingComputerHKLM\SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization

Policy ID: AllowVPNPeerCaching
Scope: Computer Configuration
Supported on: At least Windows Server 2016, Windows 10
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › Delivery Optimization

Registry

DOAllowVPNPeerCaching

REG_DWORDComputer

HKLM\SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization Current key

Checked: 1
Unchecked: 0
Element: Enable P2P while the device connects via VPN
Value type: REG_DWORD

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization]

; Options (use only one)
; Checked
"DOAllowVPNPeerCaching"=dword:00000001
; Unchecked
"DOAllowVPNPeerCaching"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization" /v "DOAllowVPNPeerCaching" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization" /v "DOAllowVPNPeerCaching" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization' -Name 'DOAllowVPNPeerCaching' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization' -Name 'DOAllowVPNPeerCaching' -PropertyType DWord -Value 0 -Force | Out-Null