Microsoft_Forefront_UAG

Source: Microsoft Unified Access Gateway Team blog.

Secured messaging has just become easier with the recently announced RC0 version of Forefront UAG. Additional authentication methods are supported out of the box, simplifying the publishing process of back-end services, particularly Exchange mail.

Objective

Configure pre-authentication of Exchange mail applications, with no impact on the end-users, providing a seamless experience. Both the login process and the session itself are intact from an end-user perspective, having the extra layer of security with Exchange experience preserved.

Here is an illustration of the authentication entities:

image

[Figure 1. Authentication entities]

Read more at the source.