SEntinel - Update whats-new.md - add support in Defender MTO

Author: cwatson-cat

articles/sentinel/whats-new.md

@@ -20,12 +20,17 @@ The listed features were released in the last three months. For information abou
 
 ## August 2024
 
+- [Microsoft Sentinel support in Microsoft Defender multitenant management (Preview)](microsoft-sentinel-support-in-microsoft-defender-multitenant-management-preview)
 - [Premium Microsoft Defender Threat Intelligence data connector (Preview)](#premium-microsoft-defender-threat-intelligence-data-connector-preview)
 - [Unified AMA-based connectors for syslog ingestion](#unified-ama-based-connectors-for-syslog-ingestion)
 - [Better visibility for Windows security events](#better-visibility-for-windows-security-events)
 - [New Auxiliary logs retention plan (Preview)](#new-auxiliary-logs-retention-plan-preview)
 - [Create summary rules for large sets of data (Preview)](#create-summary-rules-in-microsoft-sentinel-for-large-sets-of-data-preview)
 
+### Microsoft Sentinel support in Microsoft Defender multitenant management (Preview)
+
+If you've onboarded Microsoft Sentinel to the Microsoft unified security operations platform, Microsoft Sentinel data is now available with Defender XDR data in Microsoft Defender multitenant management. Only one Microsoft Sentinel workspace per tenant is currently supported in the Microsoft unified security operations platform. So, Microsoft Defender multitenant management shows security information and event management (SIEM) data from one Microsoft Sentinel workspace per tenant. For more information, see [Microsoft Defender multitenant management](/defender-xdr/mto-overview).
+
 ### Premium Microsoft Defender Threat Intelligence data connector (Preview)
 
 Your premium license for Microsoft Defender Threat Intelligence (MDTI) now unlocks the ability to ingest all premium indicators directly into your workspace. The premium MDTI data connector adds more to your hunting and research capabilities within Microsoft Sentinel.