The April 2025 Scan Cab is available

IMPORTANT: This notice only affects environments where Scan Cab is used to check for update compliance. The April 2025 Scan Cab was made available at 8:00 PM PT today, April 9, 2025. The Scan Cab can help determine whether a Windows device needs to install necessary security updates released by Microsoft without first connecting to the Windows Update service.    How this affects your organization: The Wsusscn2.cab file is a cabinet file that is signed by Microsoft and contains information about Microsoft security-related updates. Devices that aren’t connected to the Internet can be scanned to see whether these security-related updates are present or required. The Wsusscn2.cab file doesn’t contain the security updates themselves so you must obtain and install any needed security-related updates through other means.    What you need to do to prepare: You can download and deploy the April 2025 Scan Cab via the usual processes. For detailed guidance, see the Additional information section below. No action is required on environments where Scan Cab is not employed. However, please note that there might be non-Microsoft applications which utilize Scan Cab. Review the documentation for any software and update deployment tools used in your organization to understand if this is applicable in your environment.   Additional information: Updated Scan Cab: Download the new Scan Cab here Announcing a smaller WSUS Scan Cab: Learn more about WSUS and the Scan Cab process Using WUA to Scan for Updates Offline: Windows Update Agent (WUA) can be used to scan computers for security updates without connecting to Windows Update WSUS and the Catalog Site: The Catalog Site used by WSUS to import updates and drivers Message ID: MC1052165

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