Microsoft says Home windows 10 updates launched for the reason that begin of the 12 months are breaking Microsoft Linked Cache (MCC) node discovery on enterprise networks.
MCC servers are software-only caching options that may be deployed on Home windows servers, bare-metal servers, or VMs to cache and ship content material downloaded from Microsoft’s content material supply community (CDN).
As an example, as soon as a consumer downloads a Home windows replace, the remainder of the customers on the enterprise community are pointed to one of many MCC nodes for sooner supply over the native community.
This recognized concern solely impacts methods operating Home windows 10 21H2 and 22H2 configured to search out MCC endpoints utilizing DHCP Possibility 235.
“After installing the January 2024 non-security update (KB5034203), released January 23, 2024, or later updates, some Windows devices which use the DHCP Option 235 for discovery of Microsoft Connected Cache (MCC) nodes in their network might be unable to use the MCC nodes,” Microsoft explains.
“Instead, these Windows devices will download updates and apps from the public internet and IT administrators would see increased download traffic on their internet routes.”
Redmond says dwelling customers are unlikely to be impacted as Linked Cache configured through DHCP Possibility 235 is extra widespread in enterprises.
The corporate is at the moment engaged on an answer, with extra info to be supplied in an upcoming launch.
Workarounds accessible
Till a repair is on the market, Microsoft offers momentary workarounds permitting admins to revive the obtain caching for his or her end-users.
The primary choice is configuring the Microsoft Linked Cache endpoint within the DOCacheHost coverage in keeping with directions on the Cache hostname web page.
Moreover, set DOCacheHostSource to 1 or take away it, as indicated within the Cache hostname supply assist doc.
Affected admins may mitigate the difficulty utilizing Group Insurance policies, which can be found by Redmond’s assist channel (they’ll additionally request assist by the paid Microsoft Assist for Enterprise channel).
This week, Microsoft additionally mounted a recognized concern that causes 0x80073cf2 errors when utilizing the System Preparation (Sysprep) software to validate Home windows installations for deployment after putting in November Home windows 10 updates.
