Learn Editor: Update whats-new.md

Author: diannegali

defender-xdr/whats-new.md

@@ -31,6 +31,8 @@ You can also get product updates and important notifications through the [messag
 
 ## September 2024
 
+- (Preview) Security analysts can now investigate a user's insider risk in the Microsoft Defender portal with **insider risk severity and insights** available for Microsoft Defender XDR users with provisioned access to Microsoft Purview Insider Risk Management. 
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 - (GA) The global search for entities in the Microsoft Defender portal is now generally available. The enhanced search results page centralizes the results from all entities. For more information, see [Global search in the Microsoft Defender portal](microsoft-365-defender-portal.md#global-search).
 - (GA) Copilot in Defender now includes the identity summary capability, providing instant insights into a user's risk level, sign in activity, and more. For more information, see [Summarize identity information with Copilot in Defender](security-copilot-defender-identity-summary.md).
 - [Microsoft Defender Threat Intelligence](/defender/threat-intelligence/what-is-microsoft-defender-threat-intelligence-defender-ti) customers can now view the [latest featured threat intelligence articles](/defender/threat-intelligence/learn-how-to-access-microsoft-defender-threat-intelligence-and-make-customizations-in-your-portal#featured-threat-intelligence-articles-widget) in the Microsoft Defender portal home page. The **Intel explorer** page now also has an [article digest](/defender/threat-intelligence/learn-how-to-access-microsoft-defender-threat-intelligence-and-make-customizations-in-your-portal#article-digest) that notifies them of the number of new Defender TI articles that were published since they last accessed the Defender portal.