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Microsoft Forefront Unified Access Gateway (UAG), is a computer software solution that provides secure remote access to corporate networks for remote employees and business partners. It incorporates remote access technologies such as reverse proxy, virtual private network (VPN), DirectAccess and Remote Desktop Services. UAG was released in 2010, and is the successor for Microsoft Intelligent Application Gateway (IAG) which was released in 2007. UAG is part of the Microsoft Forefront offering. Microsoft is ending mainstream support for UAG in 2015. It is being replaced in part by the Windows Server 2012 R2 feature Web Application Proxy.