Some resources on Microsoft RDS 2012 (R2) are listed below:

What’s New in Remote Desktop Services for Windows Server 2012 R2?

Load Balancing Remote Desktop Services Web Access & Gateway with LoadMaster for Azure

Deploying and Configuring RD Web Access in Windows Server 2012

Deploying and Configuring RD Connection Broker High Availability in Windows Server 2012

RD Connection Broker Database Explained

Publishing RemoteApps in Windows Server 2012

Microsoft Remote Desktop Clients

A useful, related document is listed below:

SSL Accelerated Services, Feature Description