Last November, my colleague Phil wrote an article in this blog about using the Patch Manager Update Management Wizard to deploy third-party updates. A similar capability also exists in the Update Management Wizard for deploying Microsoft Updates, but it requires use of a different option. For the third-party updates discussed in the previous article, the files for those updates are physically present on the SUP, so it is possible for the Windows Update Agent to download those update files.
A different situation exists for Microsoft updates, because the update files for Microsoft updates are never downloaded to a Software Update Point. The Good News, though, is that the Update Management tool and the Update Management Wizard tool both have an option to instruct the client to download updates directly from Microsoft Update.
There are a number of ways in which the actual update task can be invoked.