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What's new in Delivery Optimization

This article contains information about what's new in Delivery Optimization, a peer-to-peer distribution method in Windows 10 and Windows 11.

Microsoft Connected Cache (early preview)

Microsoft Connected Cache is a software-only caching solution that delivers Microsoft content within Enterprise networks. Connected Cache can be deployed to as many bare-metal servers or VMs as needed, and is managed from a cloud portal. Cache nodes are created in the cloud portal and are configured by applying the client policy using management tools such as Intune.

For more information about Connected Cache, see Microsoft Connected Cache overview.

There are two different versions:

New in Delivery Optimization for Windows

General

Check out the new Delivery Optimization Troubleshooter. This tool provides a device health check to verify the device is set up properly to use Delivery Optimization. To scope the output more specifically, use one of the available switches:

  • -HealthCheck: Provides an overall check of the device setup to ensure Delivery Optimization communication is possible on the device.
  • -P2P: Provides output specific to P2P settings, efficiency, and errors.
  • -MCC: Provides output specific to Connected Cache settings and verifies the client can access the cache server.

Windows 11 22H2

  • New setting: Customize VPN detection by choosing custom keywords. Now, you don't have to rely on Delivery Optimization keywords to detect your VPN. By using the new VpnKeywords setting, you can add keywords for Delivery Optimization to use to detect when a VPN is in use. You can find this configuration VPN Keywords in Group Policy or MDM under DOVpnKeywords.
  • New setting: Use the disallow downloads from a connected cache server, when a VPN is detected and you want to prevent the download from the connected cache server. You can find this configuration Disallow download from Connected Cache over VPN in Group Policy or MDM under DODisallowCacheServerDownloadsOnVPN.
  • Delivery Optimization introduced support for receiver side ledbat (rLEDBAT).
  • New setting: Local Peer Discovery, a new option for Restrict Peer Selection By in Group Policy or MDM DORestrictPeerSelectionBy. This option restricts the discovery of local peers using the DNS-SD protocol. When you set Option 2, Delivery Optimization restricts peer selection to peers that are locally discovered (using DNS-SD).

Note

The Local Peer Discovery (DNS-SD, RFC 6763) option can only be set via MDM delivered policies on Windows 11 builds. This feature can be enabled in supported Windows 10 builds by setting the HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization\DORestrictPeerSelectionBy value to 2. For more information, see Delivery Optimization reference.

  • Starting with Windows 11, the Bypass option of Download Mode is no longer used.