If you come across a link such as https://msdn.microsoft.com/en-us/library/cc770670.aspx and the page is missing the navigation menu on the left, just change "msdn" to "TechNet" in the link, for example:
https://technet.microsoft.com/en-us/library/cc770670.aspx
Several NAP documentation pages have become orphaned when MSDN is in the URL due to a publishing bug.