diff --git a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/deviceupdate.json b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/deviceupdate.json
index 0a9a07e70a3c..51a0f5fc7a12 100644
--- a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/deviceupdate.json
+++ b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/deviceupdate.json
@@ -1030,6 +1030,55 @@
         "deprecated": false
       }
     },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DeviceUpdate/accounts/{accountName}/privateEndpointConnectionProxies/{privateEndpointConnectionProxyId}/updatePrivateEndpointProperties": {
+      "post": {
+        "description": "(INTERNAL - DO NOT USE) Updates a private endpoint inside the private endpoint connection proxy object.",
+        "operationId": "PrivateEndpointConnectionProxies_UpdatePrivateEndpointProperties",
+        "parameters": [
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "$ref": "#/parameters/AccountNameParameter"
+          },
+          {
+            "$ref": "#/parameters/PrivateEndpointConnectionProxyIdParameter"
+          },
+          {
+            "name": "privateEndpointUpdate",
+            "in": "body",
+            "description": "The parameters for updating a private endpoint connection proxy.",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/PrivateEndpointUpdate"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Update private endpoint in private endpoint connection proxy empty response."
+          },
+          "default": {
+            "description": "Error response describing the reason for operation failure.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "PrivateEndpointConnectionProxyPrivateEndpointUpdate": {
+            "$ref": "./examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_PrivateEndpointUpdate.json"
+          }
+        },
+        "deprecated": false
+      }
+    },
     "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DeviceUpdate/accounts/{accountName}/privateEndpointConnectionProxies/{privateEndpointConnectionProxyId}": {
       "get": {
         "tags": [
@@ -1582,10 +1631,21 @@
           "description": "Remote endpoint resource ID.",
           "type": "string"
         },
+        "location": {
+          "description": "ARM location of the remote private endpoint.",
+          "type": "string"
+        },
+        "immutableSubscriptionId": {
+          "description": "Original subscription ID needed by Microsoft.Network.",
+          "type": "string"
+        },
+        "immutableResourceId": {
+          "description": "Original resource ID needed by Microsoft.Network.",
+          "type": "string"
+        },
         "vnetTrafficTag": {
           "description": "Virtual network traffic tag.",
-          "type": "string",
-          "readOnly": true
+          "type": "string"
         },
         "manualPrivateLinkServiceConnections": {
           "description": "List of private link service connections that need manual approval.",
@@ -1617,6 +1677,32 @@
         }
       }
     },
+    "PrivateEndpointUpdate": {
+      "description": "Private endpoint update details.",
+      "type": "object",
+      "properties": {
+        "id": {
+          "description": "Remote endpoint resource ID.",
+          "type": "string"
+        },
+        "location": {
+          "description": "ARM location of the remote private endpoint.",
+          "type": "string"
+        },
+        "immutableSubscriptionId": {
+          "description": "Original subscription ID needed by Microsoft.Network.",
+          "type": "string"
+        },
+        "immutableResourceId": {
+          "description": "Original resource ID needed by Microsoft.Network.",
+          "type": "string"
+        },
+        "vnetTrafficTag": {
+          "description": "Virtual network traffic tag.",
+          "type": "string"
+        }
+      }
+    },
     "PrivateLinkServiceConnection": {
       "description": "Private link service connection details.",
       "type": "object",
diff --git a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_CreateOrUpdate.json b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_CreateOrUpdate.json
index 93a28ec2f88c..c7e5d5e4d542 100644
--- a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_CreateOrUpdate.json
+++ b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_CreateOrUpdate.json
@@ -7,7 +7,10 @@
     "api-version": "2020-03-01-preview",
     "privateEndpointConnectionProxy": {
       "remotePrivateEndpoint": {
-        "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{privateEndpointConnectionProxyId}",
+        "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
+        "location": "westus2",
+        "immutableSubscriptionId": "00000000-0000-0000-0000-000000000000",
+        "immutableResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
         "manualPrivateLinkServiceConnections": [
           {
             "name": "{privateEndpointConnectionProxyId}",
@@ -33,7 +36,10 @@
         "name": "peexample01",
         "type": "Microsoft.DeviceUpdate/accounts/privateEndpointConnectionProxies",
         "remotePrivateEndpoint": {
-          "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{privateEndpointConnectionProxyId}",
+          "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
+          "location": "westus2",
+          "immutableSubscriptionId": "00000000-0000-0000-0000-000000000000",
+          "immutableResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
           "manualPrivateLinkServiceConnections": [
             {
               "name": "{plsConnectionName}",
diff --git a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_Get.json b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_Get.json
index 1ae43f3d3a1f..ff91aca1a7aa 100644
--- a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_Get.json
+++ b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_Get.json
@@ -13,7 +13,10 @@
         "name": "peexample01",
         "type": "Microsoft.DeviceUpdate/accounts/privateEndpointConnectionProxies",
         "remotePrivateEndpoint": {
-          "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{privateEndpointConnectionProxyId}",
+          "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
+          "location": "westus2",
+          "immutableSubscriptionId": "00000000-0000-0000-0000-000000000000",
+          "immutableResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
           "manualPrivateLinkServiceConnections": [
             {
               "name": "{plsConnectionName}",
diff --git a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_ListByAccount.json b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_ListByAccount.json
index c02dec9714ca..d46b71e4680f 100644
--- a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_ListByAccount.json
+++ b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_ListByAccount.json
@@ -14,7 +14,10 @@
             "name": "peexample01",
             "type": "Microsoft.DeviceUpdate/accounts/privateEndpointConnectionProxies",
             "remotePrivateEndpoint": {
-              "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{privateEndpointConnectionProxyId}",
+              "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
+              "location": "westus2",
+              "immutableSubscriptionId": "00000000-0000-0000-0000-000000000000",
+              "immutableResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
               "manualPrivateLinkServiceConnections": [
                 {
                   "name": "{plsConnectionName}",
diff --git a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_PrivateEndpointUpdate.json b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_PrivateEndpointUpdate.json
new file mode 100644
index 000000000000..c3f4cabc345f
--- /dev/null
+++ b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_PrivateEndpointUpdate.json
@@ -0,0 +1,19 @@
+{
+  "parameters": {
+    "subscriptionId": "00000000-0000-0000-0000-000000000000",
+    "resourceGroupName": "test-rg",
+    "accountName": "contoso",
+    "privateEndpointConnectionProxyId": "peexample01",
+    "api-version": "2020-03-01-preview",
+    "privateEndpointUpdate": {
+      "id": "/subscriptions/11111111-1111-1111-1111-111111111111/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
+      "location": "westus2",
+      "immutableSubscriptionId": "00000000-0000-0000-0000-000000000000",
+      "immutableResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
+      "vnetTrafficTag": "12345678"
+    }
+  },
+  "responses": {
+    "200": {}
+  }
+}
diff --git a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_Validate.json b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_Validate.json
index 30a2a6a8dfbd..cd155245c3ec 100644
--- a/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_Validate.json
+++ b/specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/examples/PrivateEndpointConnectionProxies/PrivateEndpointConnectionProxy_Validate.json
@@ -8,6 +8,9 @@
     "privateEndpointConnectionProxy": {
       "remotePrivateEndpoint": {
         "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{privateEndpointConnectionProxyId}",
+        "location": "westus2",
+        "immutableSubscriptionId": "00000000-0000-0000-0000-000000000000",
+        "immutableResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Network/privateEndpoints/{peName}",
         "manualPrivateLinkServiceConnections": [
           {
             "name": "{privateEndpointConnectionProxyId}",