Microsoft’s December 2025 security update has introduced a significant compatibility issue affecting Message Queuing (MSMQ) functionality across Windows Server and client environments. The problematic update, identified as KB5071546 (OS Build 19045.6691), was released on December 9, 2025, and has already impacted organizations relying on MSMQ for inter-application communication, particularly in Internet Information Services (IIS) deployments. […]

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Source: gbHackers
Source Link: https://gbhackers.com/microsoft-updates-disrupt-msmq-functionality-on-iis/