AZ-104 Question 281
Single answerYour organization hosts a critical web application on several Windows-based Azure Virtual Machines in the East US region. You are tasked with configuring disaster recovery by replicating these VMs to the West Europe region using Azure Site Recovery. You create a Recovery Services vault in West Europe, configure a replication policy, and install the ASR extension on each VM. However, replication fails repeatedly due to errors indicating that the target resources cannot be allocated. Which action is most likely to resolve this issue?
- A
Create and associate a virtual network in the West Europe region for the replicated VMs.
- B
Upgrade the VM operating system to Windows Server 2022 before enabling replication.
- C
Enable geo-redundant storage (GRS) on the source VMs’ OS disks.
- D
Deploy an additional Recovery Services vault in the East US region for failback.
Show answer and explanation
Correct answer: A
Explanation
Azure Site Recovery requires a properly configured target network in the destination region to successfully allocate replicated resources. Without an associated virtual network in West Europe, replication will fail when attempting to provision the replicated VMs.
- A. Correct.
When configuring Azure Site Recovery for cross-region replication, you need to specify a target virtual network in the destination region. If this network is missing or incorrectly configured, resource allocation errors may occur.
- B. Incorrect.
Although having a modern OS can be beneficial, there is no direct requirement to upgrade the OS version to resolve target resource allocation errors. ASR supports a range of Windows OS versions.
- C. Incorrect.
Adjusting disk replication from locally redundant to geo-redundant storage is not necessary for Azure-to-Azure VM replication. It mainly affects data redundancy rather than addressing target resource allocation.
- D. Incorrect.
Creating a second vault in the source region is an optional strategy for advanced failback scenarios, but it does not resolve issues related to resource allocation in the target region.