Here is a great post over The Deployment Guys Blog.  A client actually sent this to me today and I hadn’t read it before.  This was one of the main pain points when building your images with MDT Lite Touch. 

Read the full post here.

You’ve no doubt read some of the benefits around using the Software Update Point features of ConfigMgr. However, if you are already using MDT standalone as an Image Engineering environment – there is sometimes a duplication in having to manage software updates in both environments. The most common solution is to set up an external standalone WSUS server for your reference machine to pull down updates. However, it would be ideal to have a single place to manage the approval and download of updates for both the deployed machines in ConfigMgr environment and the reference machine during an image capture in the MDT standalone environment.