By Sergiu Gatlan
Publication Date: 2025-12-17 12:30:00
Microsoft has asked businesses to reach out for advice on how to temporarily mitigate a known Message Queuing (MSMQ) issue causing enterprise apps and Internet Information Services (IIS) sites to fail.
MSMQ is an optional Windows service commonly used in enterprise environments that helps apps communicate over a network.
The known issue mainly affects enterprise users with Windows 10 22H2, Windows Server 2019, and Windows Server 2016 devices that have installed the KB5071546, KB5071544, and KB5071543 security updates released during the December 2025 Patch Tuesday.
While Microsoft is investigating it and working on a fix, in a Tuesday update to the Windows release health dashboard, it advised enterprise customers to reach out for details on how to temporarily mitigate this bug in their environments.
“Individuals using Windows Home or Pro editions on personal devices are very unlikely to experience this issue. This issue primarily affects enterprise…
