WSUS and the Microsoft Update Catalog
The Microsoft Update Catalog is a service that provides a listing of updates that can be distributed over a corporate network. You can use the catalog for finding information about Microsoft software updates, drivers, and hotfixes. WSUS currently includes an option to Import Updates from the Microsoft Update Catalog. However, the Import Updates action in WSUS was built using ActiveX, which is now deprecated. This import functionality within WSUS has been replaced with a PowerShell script. The script allows you to import a single update, or multiple updates into WSUS. This article provides information about the catalog, the import script, and how to use the script.
