Microsoft has unveiled a comprehensive guide aimed at IT administrators who are keen on streamlining Windows deployments while minimizing bandwidth consumption across managed devices. The tech giant advocates for the configuration of Windows Delivery Optimization via Microsoft Intune, a tool that empowers enterprises to exert greater control over how devices download Windows updates and other supported content.
Understanding Delivery Optimization
At its core, Delivery Optimization employs a peer-to-peer sharing mechanism, allowing devices to retrieve portions of content from other machines rather than relying solely on Microsoft servers. This approach is particularly advantageous for organizations managing extensive fleets of Windows PCs, as it alleviates the strain on internet connections caused by repetitive downloads of identical update files.
However, it is essential to note that for general users, Delivery Optimization may be resource-intensive, particularly concerning memory usage. Microsoft is optimistic that the newly introduced performance tools will address any potential memory leak issues.
Customizing Peer Groups and Bandwidth Control
For enterprise environments, Microsoft provides the capability for administrators to configure distinct peer groups tailored to their network topology. This includes options to limit peers to devices behind the same NAT or to establish private groups using a specific Group ID. Furthermore, the configuration allows for precise control over the bandwidth consumed by Delivery Optimization. Intune enables administrators to set maximum download bandwidth for both foreground and background activities, with the flexibility to impose different limits during business hours compared to off-hours. Microsoft also suggests implementing delays for HTTP downloads, granting Delivery Optimization the necessary time to identify suitable peers before reverting to alternative sources.
Enhancing Efficiency with Connected Cache
In conjunction with Delivery Optimization, Microsoft introduces Connected Cache, a software caching solution designed to further reduce bandwidth usage when delivering Microsoft content and updates. By storing frequently requested content locally, Connected Cache serves this data to devices over the organization’s network, eliminating the need for each device to download the same content independently from Microsoft.
To illustrate the potential savings, Microsoft shares a compelling statistic: “A 1 GB cumulative update pushed to 10,000 devices means 10 TB of traffic from the internet unless Delivery Optimization lets devices share locally.“
Moreover, Microsoft advises coordinating Delivery Optimization with deployment rings. The strategy involves initiating a small seeder ring, typically comprising 5 to 10 percent of devices, to populate peer caches before broader deployment rings commence hours or days later. If Connected Cache is implemented, the same seeder ring will also populate the cache node, establishing a persistent local source for subsequent rings.
Policy Settings for Delivery Optimization
Microsoft has outlined various policy settings for Delivery Optimization (DO) and their respective benefits in the table below:
| Setting | Default Value* | Recommended Value | What It Does |
|---|---|---|---|
| DODownloadMode | 1 (LAN) | 1 (LAN) | Keeps peer-to-peer sharing within your subnet or Delivery Optimization group. |
| DORestrictPeerSelectionBy | 1 | 1 | Devices discover and peer with others on the same subnet. |
| DOMaxCacheSize | 20% | 20% to 30% | Amount of local disk space allocated to the Delivery Optimization cache. |
| DOMinFileSizeToCache | 50 MB | 5 MB | Minimum file size eligible for caching and peer-to-peer distribution. |
| DOMaxCacheAge | 259,200 seconds (3 days) | 1,209,600 seconds (14 days) | Determines how long cached content remains available before cleanup. |
| DOMonthlyUploadDataCap | 20 GB | 20 GB | Limits the total amount of data a device can upload to peers each month. |
As Windows deployments increasingly shift towards cloud management and the size of update files continues to grow, Microsoft believes that appropriately configuring Delivery Optimization can yield significant benefits—especially for organizations overseeing hundreds or thousands of devices receiving the same updates and applications. For a more in-depth exploration, the full guide is available on Microsoft’s official Tech Community website.
