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Azure Disk Encryption for Windows (Microsoft.Azure.Security.AzureDiskEncryption)

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Overview

Azure Disk Encryption uses BitLocker to provide full disk encryption on Azure virtual machines running Windows. This solution is integrated with Azure Key Vault to manage disk encryption keys and secrets in your key vault subscription.

Prerequisites

For a full list of prerequisites, see Azure Disk Encryption for Windows VMs, specifically the following sections:

Extension Schema

There are two versions of extension schema for Azure Disk Encryption (ADE):

  • v2.2 - A newer recommended schema that does not use Microsoft Entra properties.
  • v1.1 - An older schema that requires Microsoft Entra properties.

To select a target schema, the typeHandlerVersion property must be set equal to version of schema you want to use.

The v2.2 schema is recommended for all new VMs and does not require Microsoft Entra properties.

{
  "type": "extensions",
  "name": "[name]",
  "apiVersion": "2019-07-01",
  "location": "[location]",
  "properties": {
        "publisher": "Microsoft.Azure.Security",
        "type": "AzureDiskEncryption",
        "typeHandlerVersion": "2.2",
        "autoUpgradeMinorVersion": true,
        "settings": {
          "EncryptionOperation": "[encryptionOperation]",
          "KeyEncryptionAlgorithm": "[keyEncryptionAlgorithm]",
          "KeyVaultURL": "[keyVaultURL]",
          "KeyVaultResourceId": "[keyVaultResourceID]",
          "KeyEncryptionKeyURL": "[keyEncryptionKeyURL]",
          "KekVaultResourceId": "[kekVaultResourceID]",
          "SequenceVersion": "sequenceVersion]",
          "VolumeType": "[volumeType]"
        }
  }
}

Schema v1.1: with Microsoft Entra ID

The 1.1 schema requires aadClientID and either aadClientSecret or AADClientCertificate and is not recommended for new VMs.

Using aadClientSecret:

{
  "type": "extensions",
  "name": "[name]",
  "apiVersion": "2019-07-01",
  "location": "[location]",
  "properties": {
    "protectedSettings": {
      "AADClientSecret": "[aadClientSecret]"
    },
    "publisher": "Microsoft.Azure.Security",
    "type": "AzureDiskEncryption",
    "typeHandlerVersion": "1.1",
    "settings": {
      "AADClientID": "[aadClientID]",
      "EncryptionOperation": "[encryptionOperation]",
      "KeyEncryptionAlgorithm": "[keyEncryptionAlgorithm]",
      "KeyVaultURL": "[keyVaultURL]",
      "KeyVaultResourceId": "[keyVaultResourceID]",
      "KeyEncryptionKeyURL": "[keyEncryptionKeyURL]",
      "KekVaultResourceId": "[kekVaultResourceID]",
      "SequenceVersion": "sequenceVersion]",
      "VolumeType": "[volumeType]"
    }
  }
}

Using AADClientCertificate:

{
  "type": "extensions",
  "name": "[name]",
  "apiVersion": "2019-07-01",
  "location": "[location]",
  "properties": {
    "protectedSettings": {
      "AADClientCertificate": "[aadClientCertificate]"
    },
    "publisher": "Microsoft.Azure.Security",
    "type": "AzureDiskEncryption",
    "typeHandlerVersion": "1.1",
    "settings": {
      "AADClientID": "[aadClientID]",
      "EncryptionOperation": "[encryptionOperation]",
      "KeyEncryptionAlgorithm": "[keyEncryptionAlgorithm]",
      "KeyVaultURL": "[keyVaultURL]",
      "KeyVaultResourceId": "[keyVaultResourceID]",
      "KeyEncryptionKeyURL": "[keyEncryptionKeyURL]",
      "KekVaultResourceId": "[kekVaultResourceID]",
      "SequenceVersion": "sequenceVersion]",
      "VolumeType": "[volumeType]"
    }
  }
}

Property values

Note: All values are case sensitive.

Name Value / Example Data Type
apiVersion 2019-07-01 date
publisher Microsoft.Azure.Security string
type AzureDiskEncryption string
typeHandlerVersion 2.2, 1.1 string
(1.1 schema) AADClientID xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx guid
(1.1 schema) AADClientSecret password string
(1.1 schema) AADClientCertificate thumbprint string
EncryptionOperation EnableEncryption string
(optional - default RSA-OAEP ) KeyEncryptionAlgorithm 'RSA-OAEP', 'RSA-OAEP-256', 'RSA1_5' string
KeyVaultURL url string
KeyVaultResourceId url string
(optional) KeyEncryptionKeyURL url string
(optional) KekVaultResourceId url string
(optional) SequenceVersion uniqueidentifier string
VolumeType OS, Data, All string

Template deployment

For an example of template deployment based on schema v2.2, see Azure Quickstart Template encrypt-running-windows-vm-without-aad.

For an example of template deployment based on schema v1.1, see Azure Quickstart Template encrypt-running-windows-vm.

Note

Also if VolumeType parameter is set to All, data disks will be encrypted only if they are properly formatted.

Troubleshoot and support

Troubleshoot

For troubleshooting, refer to the Azure Disk Encryption troubleshooting guide.

Support

If you need more help at any point in this article, you can contact the Azure experts on the MSDN Azure and Stack Overflow forums.

Alternatively, you can file an Azure support incident. Go to Azure support and select Get support. For information about using Azure Support, read the Microsoft Azure Support FAQ.

Next steps