Merge pull request #1619 from MicrosoftDocs/whatsnew-rbac

Added what's new.md for new rbac roles

Author: vpattnai

defender-xdr/whats-new.md

@@ -6,7 +6,7 @@ ms.service: defender-xdr
 ms.author: diannegali
 author: diannegali
 ms.localizationpriority: medium
-ms.date: 09/23/2024
+ms.date: 10/17/2024
 manager: dansimp
 audience: ITPro
 ms.collection:
@@ -29,6 +29,10 @@ For more information on what's new with other Microsoft Defender security produc
 
 You can also get product updates and important notifications through the [message center](https://admin.microsoft.com/Adminportal/Home#/MessageCenter).
 
+## October 2024
+
+- [Microsoft Unified RBAC roles](experts-on-demand.md#required-permissions-for-using-ask-defender-experts) are added with new permission levels for Microsoft Threat Experts customers to use Ask Defender experts capability.
+
 ## September 2024
 
 - (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).