Merge pull request #17696 from alkohli/5-2504

Whats new for existing deployments running 23H2 for 2504

Author: prmerger-automator[bot]

azure-local/whats-new.md

@@ -5,7 +5,7 @@ ms.topic: overview
 author: alkohli
 ms.author: alkohli
 ms.service: azure-local
-ms.date: 04/09/2025
+ms.date: 04/18/2025
 ---
 
 # What's new in Azure Local?
@@ -15,10 +15,50 @@ ms.date: 04/09/2025
 
 This article lists the various features and improvements that are available in Azure Local. The latest version of Azure Local solution focuses on cloud-based deployment and updates, cloud-based monitoring, new and simplified experience for Arc VM management, security, and more.
 
+::: moniker range="=azloc-2504"
+
+<!--Starting with 2504 release, Microsoft has introduced a new versioning schema and a release cadence. There are two 2504 releases for April. Here are the details of each release:
+
+ 
+|Solution version  |OS version |Deployment  |
+|---------|---------|---------|
+|12.2504.1001.20 | 26100.3775        | New deployments only.        |
+|11.2504.1001.19  | 23598.1551        | Existing deployments only.        |
+
+For more information, see [Release information summary](./release-information-23h2.md).-->
+
+## Features and improvements in 2504
+
+This release has the following features and improvements:
+
+<!--- **OS version changes**: Starting 2504, all new Azure Local deployments will use a new Operating System version 261000.3775.-->
+
+- **NET update installations**: There are multiple improvements in this release that increase the reliability of .NET security update installations.
+
+- **Registration and deployment changes**
+    - Starting with this release, you can download a specific version of Azure Local software instead of just the latest version. For each upcoming release, you can choose from up to last six supported versions. For more information, see [Download Azure Local software](./deploy/download-23h2-software.md).
+    - The error logging in the registration script is enhanced.
+
+<!--- **Security changes**: The Dynamic Root of Trust for Measurement (DRTM) will be enabled by default for all new 2504 deployments running Operating System version 21600.3775. For more information, see [Security features for Azure Local](./concepts/security-features.md#security-features-for-azure-local).-->
+
+- **Azure Local VM changes**
+    <!--- Software Defined Networking (SDN) enabled by Azure Arc (Preview) - Starting with this release, Azure Local now supports SDN enabled by Azure Arc for new deployments. This preview feature enables deployment of the Network Controller as a failover cluster service. The feature introduces support for Network Security Groups (NSGs) on static logical networks and Azure Local VM network adapters on these networks, allowing for granular control of network traffic.
+ 
+    To learn more about this Preview feature, see [SDN overview](./index.yml) -->
+    - **Data disk expansion**: With this release, you can expand the size of a data disk attached to an Azure Local VM. For more information, see [Expand the size of a data disk attached to an Azure Local VM](./index.yml).
+    - Documentation describing a [Comparison of the management capabilities of VMs on Azure](./concepts/compare-vm-management-capabilities.md) was released recently.
+
+- **Update improvements**: This release includes multiple bug fixes to improve the quality of the product.
+
+- **OEM license changes**: Azure Stack HCI OEM license is now known as OEM license for Azure Local. For more information, see [OEM license overview](./oem-license.md) and [OEM license and billing FAQ](./license-billing.yml).
+
+::: moniker-end
+
 ::: moniker range="=azloc-2503"
 
 ## Features and improvements in 2503
 
+
 This is a baseline release with the following features and improvements:
 
 - **Registration and deployment changes**