If you’ve been anxiously awaiting the release of Service Pack 3 for UAG (or even if you haven’t), it’s now available over at the Microsoft Download Center. It includes several new features such as support for Windows 8 devices with Internet Explorer 10 and support for Exchange 2013 and SharePoint 2013.
You can get it here:
http://www.microsoft.com/en-us/download/details.aspx?id=36788