HomeWinBuzzer NewsMicrosoft Investigates Windows 10 Update Flaw Affecting MCC Node Discovery

Microsoft Investigates Windows 10 Update Flaw Affecting MCC Node Discovery

Windows 10 updates since January 2024 break Microsoft Connected Cache for some business users.


has identified an issue with Windows 10 updates released since January 2024, which hampers the discovery of Microsoft Connected Cache (MCC) nodes on enterprise networks. The problem specifically affects systems running Windows 10 versions 21H2 and 22H2 that utilize DHCP Option 235 for MCC endpoint discovery. Following the installation of the January 2024 non-security update (KB5034203) or subsequent updates, some devices have been unable to utilize MCC nodes for downloading updates and apps. Instead, these devices are directed to download content directly from the public internet, leading to increased download traffic and potential network congestion for enterprise networks.

Technical Background and Implications

Microsoft Connected Cache servers serve as a software-only caching solution that can be deployed across various platforms, including Windows servers, bare-metal servers, or VMs. These servers are designed to cache and deliver content from Microsoft's content delivery network (CDN), optimizing network efficiency by reducing the need for multiple devices to download the same content from the internet. The issue at hand disrupts this efficiency, forcing devices to bypass the local caching mechanism and directly access content from Microsoft's CDN, thereby increasing internet traffic and potentially slowing down network performance within affected enterprises.

Current Solutions and Future Actions

Microsoft is actively working on a permanent fix for the problem. In the meantime, the company has provided temporary workarounds to help administrators mitigate the issue and restore caching functionality for their networks. One such workaround involves configuring the Microsoft Connected Cache endpoint in the DOCacheHost policy, with detailed instructions available on the Cache hostname page. Additionally, administrators can adjust the DOCacheHostSource setting to 1 or remove it altogether, as outlined in the Cache hostname source support document. For those needing further assistance, Microsoft encourages the use of Group Policies or reaching out through the Microsoft Support for Business channel for more personalized support.

In a related development, Microsoft has also addressed a separate issue this week, where the System Preparation (Sysprep) tool encountered 0x80073cf2 errors during Windows installations validation after November Windows 10 updates. This fix is part of Microsoft's ongoing efforts to ensure stability and reliability across its and enterprise solutions. As Microsoft continues to investigate and resolve these issues, enterprise network administrators are advised to stay informed on the latest updates and workarounds to ensure network efficiency and security.

Luke Jones
Luke Jones
Luke has been writing about all things tech for more than five years. He is following Microsoft closely to bring you the latest news about Windows, Office, Azure, Skype, HoloLens and all the rest of their products.

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