Add What's New entry for lab deployments

Author: rcdun

articles/communications-gateway/lab.md

@@ -19,11 +19,11 @@ You must have deployed a standard deployment or be about to deploy a standard de
 
 ## Uses of lab deployments
 
-You can use a lab deployment to:
+Lab deployments allow you to make changes and test them without affecting your production deployment. For example, you can:
 
-- Test your configuration changes to Azure Communications Gateway before they're released to the production deployment.
-- Test new Azure Communications Gateway features and services before they're enabled and configured for the production deployment (for example, configuring Microsoft Teams Direct Routing or Zoom Phone Cloud Peering).
-- Test changes in your network before you release them to your production network.
+- Test configuration changes to Azure Communications Gateway.
+- Test new Azure Communications Gateway features and services (for example, configuring Microsoft Teams Direct Routing or Zoom Phone Cloud Peering).
+- Test changes in your preproduction network, before rolling them out to your production networks.
 
 Lab deployments support all the communications services supported by production deployments.
 

articles/communications-gateway/whats-new.md

@@ -5,13 +5,27 @@ author: rcdun
 ms.author: rdunstan
 ms.service: communications-gateway
 ms.topic: whats-new
-ms.date: 11/17/2023
+ms.date: 03/01/2024
 ---
 
 # What's new in Azure Communications Gateway?
 
 This article covers new features and improvements for Azure Communications Gateway.
 
+## March 2024
+
+### Lab deployments
+
+From March 2024, you can set up a dedicated lab deployment of Azure Communications Gateway. Lab deployments allow you to make changes and test them without affecting your production deployment. For example, you can:
+
+- Test configuration changes to Azure Communications Gateway.
+- Test new Azure Communications Gateway features and services (for example, configuring Microsoft Teams Direct Routing or Zoom Phone Cloud Peering).
+- Test changes in your preproduction network, before rolling them out to your production networks.
+
+You plan for, order, and deploy lab deployments in the same way as production deployments.
+
+For more information, see [Lab Azure Communications Gateway overview](lab.md).
+
 ## November 2023
 
 ### Support for Zoom Phone Cloud Peering