Clarified supported linux distros

Author: msmbaldwin

articles/security/azure-security-disk-encryption-faq.md

@@ -32,7 +32,11 @@ Azure Disk Encryption is available on standard tier VMs including [A, D, DS, G,
 
 ## <a name="bkmk_LinuxOSSupport"></a> What Linux distributions does Azure Disk Encryption support?
 
-Azure Disk Encryption is supported on the following Linux server distributions and versions:
+Azure Disk Encryption is supported on a subset of [Azure endorsed Linux distributions](../virtual-machines/linux/endorsed-distros.md), which is itself a subset of all possible distributions.
+
+ ![Venn Diagram of Linux server distributions that support Azure Disk Encryption](./media/azure-security-disk-encryption-faq/ade-supported-distros.png)
+
+Distributions that are not endorsed by Azure do not support Azure Disk Encryption and, of those that are endorsed, only the following Linux server distributions and versions support Azure Disk Encryption:
 
 | Linux distribution | Version | Volume type supported for encryption|
 | --- | --- |--- |
@@ -59,7 +63,8 @@ Azure Disk Encryption is supported on the following Linux server distributions a
 | SLES | 12-SP4 | Data disk |
 | SLES | 12-SP3 | Data disk |
 
-*__New ADE implementation is supported for RHEL OS and data disk for RHEL7 Pay-As-You-Go images. ADE is currently not supported for RHEL Bring-Your-Own-Subscription (BYOS) images. Please also refer to the [Azure Disk Encryption for Linux](azure-security-disk-encryption-linux.md) article for more information.__
+> [!NOTE]
+> New ADE implementation is supported for RHEL OS and data disk for RHEL7 Pay-As-You-Go images. ADE is currently not supported for RHEL Bring-Your-Own-Subscription (BYOS) images. Please also refer to the [Azure Disk Encryption for Linux](azure-security-disk-encryption-linux.md) article for more information.__
 
 ## How can I start using Azure Disk Encryption?
 

articles/security/azure-security-disk-encryption-prerequisites.md

@@ -12,7 +12,7 @@ ms.custom: seodec18
 
 # Azure Disk Encryption prerequisites
 
- This article, Azure Disk Encryption Prerequisites, explains items that need to be in place before you can use Azure Disk Encryption. Azure Disk Encryption is integrated with [Azure Key Vault](https://docs.microsoft.com/azure/key-vault/) to help manage encryption keys. You can use [Azure PowerShell](/powershell/azure/overview), [Azure CLI](/cli/azure/), or the [Azure portal](https://portal.azure.com) to configure Azure Disk Encryption.
+This article, Azure Disk Encryption Prerequisites, explains items that need to be in place before you can use Azure Disk Encryption. Azure Disk Encryption is integrated with [Azure Key Vault](https://docs.microsoft.com/azure/key-vault/) to help manage encryption keys. You can use [Azure PowerShell](/powershell/azure/overview), [Azure CLI](/cli/azure/), or the [Azure portal](https://portal.azure.com) to configure Azure Disk Encryption.
 
 Before you enable Azure Disk Encryption on Azure IaaS VMs for the supported scenarios that were discussed in the [Azure Disk Encryption Overview](azure-security-disk-encryption-overview.md) article, be sure to have the prerequisites in place. 
 
@@ -29,7 +29,7 @@ Azure Disk Encryption is supported on the following operating systems:
 For Windows Server 2008 R2, you must have .NET Framework 4.5 installed before you enable encryption in Azure. Install it from Windows Update with the optional update Microsoft .NET Framework 4.5.2 for Windows Server 2008 R2 x64-based systems (KB2901983).
 - Windows Server 2012 R2 Core and Windows Server 2016 Core are supported by Azure Disk Encryption once the bdehdcfg component is installed on the VM.
 - Windows client versions: Windows 8 client and Windows 10 client.
-- Azure Disk Encryption is only supported on specific Azure Gallery based Linux server distributions and versions. For the list of currently supported versions, refer to the [Azure Disk Encryption FAQ](azure-security-disk-encryption-faq.md#bkmk_LinuxOSSupport).
+- Azure Disk Encryption is only supported on specific Azure Gallery based Linux server distributions and versions. For the list of currently supported versions, refer to the [Azure Disk Encryption FAQ](azure-security-disk-encryption-faq.md#bkmk_LinuxOSSupport). Refer to the [Linux distributions endorsed on Azure](../virtual-machines/linux/endorsed-distros.md) for the list of images supported by Microsoft, and to the [What Linux distributions does Azure Disk Encryption support?](azure-security-disk-encryption-faq.md#bkmk_LinuxOSSupport) in the [Azure Disk Encryption FAQ](azure-security-disk-encryption-faq.md) for the list of currently supported versions based on the endorsed image distributions.
 - Azure Disk Encryption requires that your key vault and VMs reside in the same Azure region and subscription. Configuring the resources in separate regions causes a failure in enabling the Azure Disk Encryption feature.
 
 ## <a name="bkmk_LinuxPrereq"></a> Additional prerequisites for Linux IaaS VMs