Microsoft Windows Update Delivery Optimization is the Windows kernel code (user-agent) that acts on behalf of your Windows OS to get Windows updates and Microsoft Store apps downloaded. It can download from MS, your local network admin share, or other peers from the Internet (p2p). It helps reduce the bandwidth to Microsoft.

This SonicWALL signature identifies legitimate Microsoft Windows Update Delivery Optimization traffic. The primary purpose of this signature is for bandwidth management when used in the Application Firewall feature or to block Windows from downloading Updates or from its App Store.