Microsoft Urges IT Admins to Reach Out as December Windows Updates Break MSMQ

Microsoft has confirmed that a recent set of Windows security updates is causing Microsoft Message Queuing (MSMQ) issues across several enterprise environments. The company now advises IT administrators to contact Microsoft Support for Business to receive guidance on temporary mitigation steps.

December 2025 Patch Tuesday Updates at the Center of the Issue

The problem ties directly to the December 2025 Patch Tuesday security updates, specifically KB5071546, KB5071544, and KB5071543. Microsoft says the issue affects enterprise systems running Windows 10 22H2, Windows Server 2019, and Windows Server 2016. Personal devices running Windows Home or Pro editions remain very unlikely to see any impact.

MSMQ Queues and Enterprise Applications Affected

In impacted environments, MSMQ queues can become inactive, which prevents enterprise applications from writing to queues or operating normally. This behavior can break internal workflows and disrupt services that depend on message-based processing.

Administrators have also reported IIS websites failing with “insufficient resources” errors. These failures occur even when servers have sufficient disk space and memory, suggesting the issue stems from the MSMQ disruption rather than actual hardware limitations.

Microsoft has acknowledged the bug but has not shared a permanent fix or an estimated release timeline. The company continues to investigate while collecting data from affected enterprise customers.

Microsoft Recommends Contacting Support for Workarounds

Because environments vary widely, Microsoft recommends that enterprise IT teams contact Microsoft Support for Business to receive tailored workaround instructions. These temporary fixes depend on system configuration and deployment specifics.

As a temporary measure, organizations may also consider rolling back the problematic December updates to restore MSMQ functionality. IT teams should balance this approach against the security risks of removing recent Patch Tuesday fixes.

Via Bleeping Computer

Milan has been enthusiastic about technology ever since his childhood days, and this led him to take interest in all PC-related technologies. He’s a PC enthusiast and he spends most of his time learning about computers and technology.

Before joining WindowsReport, he worked as a front-end web developer. Now, he’s one of the Troubleshooting experts in our worldwide team, specializing in Windows errors & software issues.