Oct 02, 2019 Anyone know correct channel to ask Microsoft to sign the wsusscn2.cab file. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. When the Last-Modified value changes, a new version of wsusscn2.cab is available. Note that this file is updated infrequently, usually only once a month on Patch Tuesday when new security updates are released, so depending on your scenario it is probably sufficient to check at most a few times a day.
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Windows Update Agent (WUA) can be used to scan computers for security updates without connecting to Windows Update or to a Windows Server Update Services (WSUS) server, which enables computers that are not connected to the Internet to be scanned for security updates.
Offline scanning for updates requires the download of a signed file, Wsusscn2.cab, from Windows Update.Cab File Download
The Wsusscn2.cab file is a cabinet file that is signed by Microsoft. This file contains info about security-related updates that are published by Microsoft. Computers 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. New versions of the Wsusscn2.cab file are released periodically as security-related updates are released, removed, or revised on the Windows Update site. The latest Wsusscn2.cab file is available for download at the following location: Download Wsusscn2.cab
After you download the latest Wsusscn2.cab, the file can be provided to the AddScanPackageService method, and the WUA API can be used to search the offline computer for security updates. WUA validates that the Wsusscn2.cab is signed by a valid Microsoft certificate before running an offline scan.Example
The following example uses the Wsusscn2.cab file to scan a computer and displays updates that are missing.Mbsa Offline Cab Download
Important This script is intended to demonstrate the use of the Windows Update Agent APIs, and provide an example of how developers can use these APIs to solve problems. This script is not intended as production code, and the script itself is not supported by Microsoft (though the underlying Windows Update Agent APIs are supported).