One of our senior engineers, Matt Liacos, just found a great resource. On October 20 Microsoft released a Remote Desktop app for both Android and iPhones. This lets you connect seamlessly to any Windows 7/8 (Pro) desktop or Server. Company networks are fully supported via Terminal Server Gateway, Remote Desktop Web Access, and VPN (through iOS built-in VPN options).
Android users can download the client at: https://play.google.com/store/apps/details?id=com.microsoft.rdc.android
iPhone users download at: https://itunes.apple.com/us/app/id714464092?mt=8
For question about functionality and set up Microsoft has put together a FAQ in TechNet