Merge pull request #301419 from PriskeyJeronika/AZ

Added note, and some minor edits

Author: prmerger-automator[bot]

articles/site-recovery/azure-to-azure-how-to-enable-replication.md

@@ -4,14 +4,12 @@ description: Learn how to configure replication to another region for Azure VMs,
 author: jyothisuri
 ms.author: jsuri
 ms.topic: how-to
-ms.date: 12/23/2024
+ms.date: 06/17/2025
 ms.service: azure-site-recovery
 ---
 
-
 # Replicate Azure VMs to another Azure region
 
-
 This article describes how to enable replication of Azure VMs, from one Azure region to another.
 
 ## Before you start
@@ -73,7 +71,7 @@ Use the following procedure to replicate Azure VMs to another Azure region. As a
          :::image type="Storage" source="./media/azure-to-azure-how-to-enable-replication/storage.png" alt-text="Screenshot of Storage."::: 
 
        - **Replica-managed disk**: Site Recovery creates new replica-managed disks in the target region to mirror the source VM's managed disks with the same storage type (Standard or premium) as the source VM's managed disk.
-       - **Cache storage**: Site Recovery needs extra storage account called cache storage in the source region. All the changes happening on the source VMs are tracked and sent to cache storage account before replicating them to the target location. 
+       - **Cache storage**: Site Recovery needs extra storage account called cache storage in the source region. All the changes happening on the source VMs are tracked and sent to cache storage account before replicating them to the target location. High Churn is the only option available to protect VMs using Premium SSD v2/Ultra Disks.
          >[!Note]
          >Azure Site Recovery has a *High Churn* option that you can choose to protect VMs with high data change rate. With this, you can use a *Premium Block Blob* type of storage account. By default, the **Normal Churn** option is selected. For more information, see [Azure VM Disaster Recovery - High Churn Support](./concepts-azure-to-azure-high-churn-support.md).
          >:::image type="Churn" source="media/concepts-azure-to-azure-high-churn-support/churns.png" alt-text="Screenshot of churn.":::    

articles/site-recovery/azure-to-azure-quickstart.md

@@ -2,7 +2,7 @@
 title: Set up Azure VM disaster recovery to a secondary region with Azure Site Recovery
 description: Quickly set up disaster recovery to another Azure region for an Azure VM, using the Azure Site Recovery service.
 ms.topic: quickstart
-ms.date: 05/30/2025
+ms.date: 06/17/2025
 ms.custom: mvc, mode-other
 ms.author: jsuri
 author: jyothisuri
@@ -35,12 +35,14 @@ The following steps enable VM replication to a secondary location.
 1. On the Azure portal, from **Home** > **Virtual machines** menu, select a VM to replicate.
 1. In **Operations**, select **Disaster recovery**.
 1. From **Basics** > **Target region**, select the target region.
+   >[!Note]
+   >When you replicate VMs using Premium SSD v2 or Ultra Disks, if the source region lacks availability zones but the target region supports them, a specific zone must be chosen for failover.
 1. To view the replication settings, select **Review + Start replication**. If you need to change any defaults, select **Advanced settings**.
    >[!Note]
    >Azure Site Recovery has a *High Churn* option that you can choose to protect VMs with high data change rate. With this, you can use a *Premium Block Blob* type of storage account. By default, the **Normal Churn** option is selected. For more information, see [Azure VM Disaster Recovery - High Churn Support](./concepts-azure-to-azure-high-churn-support.md).
    >:::image type="High churn" source="media/concepts-azure-to-azure-high-churn-support/churn-for-vms.png" alt-text="Screenshot of Churn for VM.":::
    >
-   >Azure Site Recovery for Premium SSD v2 (preview) by default uses High Churn and a Premium Block Blob type. 
+   >Azure Site Recovery for Premium SSD v2 (preview) and Ultra by default uses High Churn and a Premium Block Blob type. 
 1. To start the job that enables VM replication, select **Start replication**.
 
    :::image type="content" source="media/azure-to-azure-quickstart/enable-replication1.png" alt-text="Enable replication.":::