Microsoft has released “May 2014″ version of Exchange 2013 Help Files for On-premises and Hybrid Deployments. These help files include information up to date until Cumulative Update 5 . These are offline copy of Exchange 2013 TechNet content and very useful when you want to refer something in your lab environment and don’t have internet access.
Link to Download : http://www.microsoft.com/en-us/download/details.aspx?id=35395