“This release of Forefront TMG features mail protection functionality that allows you to inspect email traffic for spam, malware and content policy compliance. 
In the E-mail Policy node you can configure Forefront TMG to inspect inbound and outbound email traffic using the E-mail Protection wizard. You can also configure the advanced Antispam and Antimalware settings and Content Filtering rules. Mail inspection functionality is implemented by Exchange Edge and Forefront Security for Exchange components, integrated into and managed by Forefront TMG.
Limitations
- You cannot configure IP Block List Providers or IP Allow List Providers in Forefront TMG Management.
- Setting authentication for Server-To-Server connections and subscribing the Exchange Edge servers to internal Exchange Hub servers do not function in this version.
- Forefront Security for Exchange (FSE) Antispam and Malware updates are not configurable through Forefront TMG, but you can configure them in the FSE administration console or in the Exchange management console.
Warning: Do not subscribe Exchange Edge to internal hub servers manually, as this will cause your configuration to fail.”
HTH,
Tom
Thomas W Shinder, M.D., MCSE
Sr. Consultant / Technical Writer
Prowess Consulting www.prowessconsulting.com
PROWESS CONSULTING | Microsoft Forefront Security Specialist
Email: [email protected]
MVP — Forefront Edge Security (ISA/TMG/IAG)