updated TOC and whatsnew

Author: diannegali

defender-xdr/TOC.yml

@@ -522,6 +522,8 @@
           href: mto-dashboard.md
         - name: Manage tenants
           href: mto-tenants.md
+        - name: Manage endpoint security policies
+          href: mto-endpoint-security-policy.md          
     - name: Reference
       items: 
       - name: Manage roles and permissions

defender-xdr/mto-endpoint-security-policy.md

@@ -19,6 +19,8 @@ appliesto:
 
 # Endpoint security policies in multitenant management
 
+[!INCLUDE [Prerelease](../includes/prerelease.md)]
+
 > [!IMPORTANT]
 > The Endpoint security policies page is available only for [users with the security administrator role in Microsoft Defender XDR](/defender-endpoint/assign-portal-access). Any other user role, such as Security Reader, cannot access the portal. When a user has the required permissions to view policies in the Microsoft Defender portal, the data is presented based on Intune permissions. If the user is in scope for Intune role-based access control, it applies to the list of policies presented in the Microsoft Defender portal. We recommend granting security administrators with the [Intune built-in role, "Endpoint Security Manager"](/intune/fundamentals/role-based-access-control#built-in-roles) to effectively align the level of permissions between Intune and Microsoft Defender XDR.
 

defender-xdr/whats-new.md

@@ -31,6 +31,7 @@ You can also get product updates and important notifications through the [messag
 
 ## April 2024
 
+- (Preview) **Endpoint security policies** in multitenant management are now available. Security administrators can manage security settings on their tenants' devices through the Endpoint security policies page in multitenant management. For more information, see [Endpoint security policies in multitenant management](mto-endpoint-security-policy.md).
 - (Preview) The **unified security operations platform** in the Microsoft Defender portal is now available. This release brings together the full capabilities of Microsoft Sentinel, Microsoft Defender XDR, and Microsoft Copilot in Microsoft Defender. For more information, see the following resources:
 
   - Blog announcement: [Unified security operations platform ready to revolutionize protection and efficiency](https://aka.ms/unified-soc-announcement)
@@ -46,6 +47,7 @@ You can also get product updates and important notifications through the [messag
 ## February 2024
 
 - (GA) **Dark mode** is now available in the Microsoft Defender portal. In the Defender portal, on the top right-hand side of the homepage, select **Dark mode**. Select **Light mode** to change the color mode back to the default.
+
 - (GA) **Assigning severity to incidents**, **assigning an incident to a group**, and the ***go hunt*** option from the attack story graph are now generally available. Guides to learn how to [assign or change incident severity](manage-incidents.md#assign-or-change-incident-severity) and [assign an incident to a group](manage-incidents.md#assign-an-incident) are in the [Manage incidents](manage-incidents.md) page. Learn how you can use the *go hunt* option by exploring [attack story](investigate-incidents.md#attack-story).
 
 - (Preview) **[Custom detection rules in Microsoft Graph security API](/graph/api/resources/security-api-overview?view=graph-rest-beta&preserve-view=true#custom-detections)** are now available.  Create advanced hunting custom detection rules specific to your org to proactively monitor for threats and take action.