In order to be in par with the Exchange Server 2010 Release Candidate release, Microsoft has made available for download the new version of Forefront Security 2010 for Exchange Server:
Microsoft Forefront Security 2010 for Exchange Server provides fast and effective protection against malware and spam by including multiple scanning engines from industry-leading security partners. It also integrates with Forefront Online Security for Exchange to provide the defense-in-depth benefits of hosted and on-premise filtering in a single solution.
Source: Microsoft Download Center
