Today we refreshed the Forefront TMG Beta documentation. As a rule, always look on Technet for the most up-to-date documentation.

If you're working with the e-mail protection feature, we recommend the topics Installing prerequisites for e-mail protection and the new procedural topics in Configuring protection from e-mail-based threats.

We're always interested in hearing your comments about the documentation. Send your feedback to isadocs@microsoft.com. 

Nathan Bigman

Content Publishing Manager

Forefront Threat Management Gateway