New disk based on ADE disk snapshot doesn't have ADE enabled?

Handinata Tanudjaja 250 Reputation points
2025-03-10T22:43:58.7+00:00

Hi everyone,

I would like to make sure if this is an intended behavior when a new disk that was based on Azure Disk Encryption (ADE) disk snapshot.

I have an ADE VM that I did a snapshot of its OS disk. I did confirm that it has ADE enabled.

Then I created a new disk based on the snapshot.
And finally I created a VM with that new disk attached.
But when I checked the VM's disk properties, it has the ADE as "Not Enabled."

Is this the intended behavior? Just want to make sure.

Thank you

Azure Disk Encryption
Azure Disk Encryption
An Azure service for virtual machines (VMs) that helps address organizational security and compliance requirements by encrypting the VM boot and data disks with keys and policies that are controlled in Azure Key Vault.
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  1. Keshavulu Dasari 4,665 Reputation points Microsoft External Staff
    2025-03-10T22:56:55.68+00:00

    Hi Handinata Tanudjaja ,

    Yes, this behavior is expected. When you create a new disk from a snapshot of an Azure Disk Encryption enabled disk, the encryption settings do not automatically carry over to the new disk. You need to re-enable ADE on the new disk after it has been created

    To ensure the new disk has ADE enabled,

    1.Attach the new disk to a VM.

    2.Enable ADE on the new disk using the Azure portal, PowerShell, or CLI.

    This process ensures that the new disk is encrypted and meets your security requirements.

    For more information:

    https://learn.microsoft.com/en-us/azure/virtual-machines/image-version-encryption?tabs=PowerShell

    https://learn.microsoft.com/en-us/azure/virtual-machines/disk-encryption-overview


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