Microsoft Exchange ActiveSync is a Microsoft Exchange synchronization protocol that is optimized to work together with high-latency and low-bandwidth networks. The protocol, that is based on HTTP and XML, lets devices, such as browser-enabled cellular telephones, Windows Phone 7, or Windows Mobile powered devices, access an organization's information on a server that is running Microsoft Exchange. Exchange ActiveSync enables mobile device users to access their e-mail, calendar, contacts, and tasks, and to continue to access this information while they are working offline.

To publish Exchange ActiveSync through Forefront Unified Access Gateway (UAG):