In some circumstances while using Malware Inspection feature on TMG you might wonder if certain malware is covered by this feature. Malware Inspection feature uses Microsoft AV Engine and the definition number that you see on TMG Update Center is same or higher than the definition from Malware Protection Center portal as you can see below:

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If you go to this portal you will see a table with the malware name and the alert level, those are malwares that Microsoft AV engine is capable to detect. You should always have the latest version for malware inspection, in other words, the version on TMG should be the same or higher than the portal. If TMG version is lower than the one listed on the portal, try to force an update using the button below under TMG Update Center:

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If you need to see if a lower version is capable to detect a malware you can switch to another version on the portal using the summary option on the right side of the page:

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Last but not least, if you need to troubleshoot definitions update, read the blog post from Jim Harrison Using Windows Server Update Service for the TMG Update Center.

Author
Yuri Diogenes
Senior Support Escalation Engineer
Microsoft CSS Forefront Security Edge Team

Technical Reviewer
Bala Natarajan
Senior Support Escalation Engineer
Microsoft CSS Forefront Security Edge Team