Is there a place that explains each of the options in the Microsoft Terminal Server (Remote Desktop Services) manager?

The following information came from http://searchsystemschannel.techtarget.com/feature/Using-Remote-Desktop-Services-Manager-RDS-CAL 

A pdf with more information can also be found at http://cdn.ttgtmedia.com/searchSystemsChannel/downloads/InstallingUsingandAdministeringRDS.pdf 

In case the URLs above fail to work, they can also be found here : 
https://files.lenovosoftware.com/support/techdocs/kb/d2039/InstallingUsingandAdministeringRDS.pdf 

https://files.lenovosoftware.com/support/techdocs/kb/d2039/Using-Desktop-Services-Manager-RDS-CAL.pdf