VPN software to connect to a Remote Access Server
I found that using the native VPN client on Android is sufficient for this (I have 4.1.2).  From the home screen, hit menu, settings, more settings, VPN, Add VPN network, put in the host name / ip address of your RAS.  Default is PPTP, which worked for me, you will be prompted to enter your domain credentials.

Currently, I am going to try to the Paranoid Anroid ROM for my phone.  http://forum.xda-developers.com/galaxy-s2/orig-development/rom-paranoidandroid-4-2-beta3-t2603784  Running stock now.  Phone is getting old.  Hopefully this will extend it's usable life.