This cmdlet does the following 1. Performs pre-requisite checks for DirectAccess to ensure that it can be installed 2. Installs ...

This cmdlet does the following 
1. Performs pre-requisite checks for DirectAccess to ensure that it can be installed
2. Installs DirectAccess for Remote Access (includes management of remote clients) or for management of remote clients only
3. Installs VPN (both Remote Access VPN and site-to-site VPN)