combining TOC change with minor doc edits into one PR

Author: mestew

articles/security/TOC.yml

@@ -42,32 +42,31 @@
       items:
       - name: About Azure Disk Encryption
         href: azure-security-disk-encryption-overview.md
+      - name: Quickstarts
+        items:
+        - name: Encrypt VM - Azure PowerShell
+          href: quick-encrypt-vm-powershell.md
       - name: Azure Disk Encryption
         items:
-        - name: Quickstarts
-          items:
-          - name: Encrypt VM - Azure PowerShell
-            href: quick-encrypt-vm-powershell.md
         - name: Disk encryption prerequisites
           href: azure-security-disk-encryption-prerequisites.md
         - name: Disk encryption for Windows VMs
           href: azure-security-disk-encryption-windows.md
         - name: Disk encryption for Linux VMs
           href: azure-security-disk-encryption-linux.md
+      - name: Appendix for disk encryption
+        href: azure-security-disk-encryption-appendix.md
+      - name: Disk encryption FAQ
+        href: azure-security-disk-encryption-faq.md
+      - name: Troubleshooting
+        href: azure-security-disk-encryption-tsg.md
       - name: Azure Disk Encryption with Azure AD app (previous release)
         items:
         - name: Disk encryption with Azure AD app prerequisites 
           href: azure-security-disk-encryption-prerequisites-aad.md
         - name: Disk encryption with Azure AD app for Windows VMs 
           href: azure-security-disk-encryption-windows-aad.md
         - name: Disk encryption with Azure AD app for Linux VMs 
-          href: azure-security-disk-encryption-linux-aad.md
-      - name: Appendix for disk encryption
-        href: azure-security-disk-encryption-appendix.md
-      - name: Disk encryption FAQ
-        href: azure-security-disk-encryption-faq.md
-      - name: Troubleshooting
-        href: azure-security-disk-encryption-tsg.md
     - name: Encrypt an Azure VM
       href: ../security-center/security-center-disk-encryption.md?toc=/azure/security/toc.json&bc=/azure/security/breadcrumb/toc.json
   - name: Azure Storage security