added toc and whatsnew

Author: diannegali

defender-xdr/TOC.yml

@@ -481,7 +481,9 @@
         - name: Troubleshoot service issues
           href: troubleshoot.md
         - name: Create Custom Defender XDR reports
-          href: defender-xdr-custom-reports.md                        
+          href: defender-xdr-custom-reports.md
+        - name: Visualize impact with the unified security summary
+          href: security-summary-report.md                                   
         - name: Microsoft Defender XDR APIs
           items:
             - name: Overview

defender-xdr/whats-new.md

@@ -6,7 +6,7 @@ ms.service: defender-xdr
 ms.author: diannegali
 author: diannegali
 ms.localizationpriority: medium
-ms.date: 02/16/2025
+ms.date: 04/02/2025
 manager: dansimp
 audience: ITPro
 ms.collection:
@@ -32,6 +32,10 @@ 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).
 
+## April 2025
+
+- (Preview) You can now highlight your security operations achievements and the impact of Microsoft Defender using the **unified security summary**. The unified security summary is available in the Microsoft Defender portal and streamlines the process for SOC teams to generate security reports, saving time usually spent on collecting data from various sources and creating reports tailored to their audiences. For more information, see [Visualize security impact with the unified security summary](security-summary-report.md).
+
 ## March 2025
 
 - (Preview) The incident description has moved within the incident page. The incident description is now displayed after the incident details. For more information, see [Incident details](investigate-incidents.md#incident-details).