With the release of ConfigMgr Prerequisites Tool 3.0.0 a new web parser method was introduced to detect the available Windows ADK version directly from the Windows Hardware Dev Center. However, Microsoft has recently completely changed the web site layout. This resulted in an issue with ConfigMgr Prerequisites Tool 3.0.0, preventing it from successfully detect the available Windows ADK versions. In this new release of the tool, this issue has been fixed.
Download ConfigMgr Prerequisites Tool 3.0.1
You can download the tool from the TechNet Gallery, following the URL below.
From this version and onward, ConfigMgr Prerequisites Tool source code will be available on GitHub:
Included in the download from the TechNet Gallery is a PDF with more details about each section of the tool.