The Microsoft Forefront comprehensive line of business security products provides greater protection and control through integration with your existing IT infrastructure and through simplified deployment, management, and analysis.

Microsoft Forefront helps you confidently meet ever-changing threats and increased business demands with highly responsive information protection and access control solutions supported by Microsoft technical guidance.

The Forefront product line currently consists of the following products:

- Forefront Client Security (formerly called Microsoft Client Protection)
- Forefront Server for Exchange Server (currently called Microsoft Antigen for Exchange)
- Forefront Server for SharePoint (currently called Microsoft Antigen for SharePoint)
- Microsoft Antigen for Instant Messaging
- Microsoft Internet Security and Acceleration Server 2006 Release Candidate

Forefront Overview :

Microsoft Forefront offers a comprehensive security product portfolio. The diagram below shows where Microsoft Forefront products fit into the Microsoft product portfolio:

More information : http://www.microsoft.com/forefront/2006/prodinfo/overview.mspx