Recently I had to setup an OpenVPN server with user account details coming from Windows Server Active Directory (as LDAP). The OpenVPN server would be in Amazon's AWS (EC2). Using the walkthrough (https://docs.openvpn.net/how-to-tutorialsguides/virtual-platforms/amazon...) on the OpenVPN site got the basic server up very quickly.
Having recently purchased a Motorola Droid Turbo (aka XT1254) I wanted to be able to connect it to a Windows 7 laptop to copy files to and from the phone. To install the drivers for Windows you must install the Motorola Device Manager (MDM) software. (Available here: https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/88481)