[Hub Generated] Review request for Microsoft.Devices to add version preview/2020-07-10-preview (#10574)

* Add Encryption related properties to IoT hub description. Needed for exposing CMK aliases

* Add Missing Descriptions

Author: joaldana

specification/iothub/resource-manager/Microsoft.Devices/preview/2020-07-10-preview/iothub.json

@@ -2376,6 +2376,10 @@
             "modelAsString": true
           }
         },
+        "encryption": {
+          "description": "The encryption properties for the IoT hub.",
+          "$ref": "#/definitions/EncryptionPropertiesDescription"
+        },
         "locations": {
           "description": "Primary and secondary location for iot hub",
           "readOnly": true,
@@ -4149,6 +4153,30 @@
           }
         }
       }
+    },
+    "EncryptionPropertiesDescription": {
+      "description": "The encryption properties for the IoT hub.",
+      "type": "object",
+      "properties": {
+        "keySource": {
+          "description": "The source of the key.",
+          "type": "string"
+        },
+        "keyVaultProperties": {
+          "description": "The properties of the KeyVault key.",
+          "$ref": "#/definitions/KeyVaultKeyProperties"
+        }
+      }
+    },
+    "KeyVaultKeyProperties": {
+      "description": "The properties of the KeyVault key.",
+      "type": "object",
+      "properties": {
+        "keyIdentifier": {
+          "type": "string",
+          "description": "The identifier of the key."
+        }
+      }
     }
   },
   "parameters": {