Over the past six months, many within the System Center Essentials community provided feedback on the inability of SCE to show which updates and software are needed by managed systems. Workarounds exist today for Microsoft Update content, but when it comes to locally-published content, or driver content obtained from a partner catalog the question remains unanswered.
It is possible to call into the WSUS 3.0 APIs and obtain this information through the use of Powershell scripting using the steps below.
Additional notes -
Hope this helps! /Ty