diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json
index 46ffa1bd76f4..d456aa7594ed 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json
@@ -3322,6 +3322,11 @@
           "description": "Discovery status of the deployment instance",
           "type": "string",
           "readOnly": true
+        },
+        "startTime": {
+          "description": "Start time of the deployment instance",
+          "type": "string",
+          "readOnly": true
         }
       }
     },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_CreateOrUpdate.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_CreateOrUpdate.json
index 0204c12e6e2b..c29a033df194 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_CreateOrUpdate.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_CreateOrUpdate.json
@@ -56,7 +56,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },
@@ -92,7 +93,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_Get.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_Get.json
index e574a0dea582..19cf2196418a 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_Get.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_Get.json
@@ -35,7 +35,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_List.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_List.json
index 221113ccf649..287ffdd7381e 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_List.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_List.json
@@ -36,7 +36,8 @@
                 {
                   "name": "instance1",
                   "status": "Running",
-                  "discoveryStatus": "pending"
+                  "discoveryStatus": "pending",
+                  "startTime": "2020-08-26T01:55:02Z"
                 }
               ]
             },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_ListClusterAllDeployments.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_ListClusterAllDeployments.json
index 221113ccf649..287ffdd7381e 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_ListClusterAllDeployments.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_ListClusterAllDeployments.json
@@ -36,7 +36,8 @@
                 {
                   "name": "instance1",
                   "status": "Running",
-                  "discoveryStatus": "pending"
+                  "discoveryStatus": "pending",
+                  "startTime": "2020-08-26T01:55:02Z"
                 }
               ]
             },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_Update.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_Update.json
index 4a778752688a..b0e5592ad49d 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_Update.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Deployments_Update.json
@@ -46,7 +46,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },
@@ -82,7 +83,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/appplatform.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/appplatform.json
index ae76a38cec67..17b94274d77c 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/appplatform.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/appplatform.json
@@ -3792,6 +3792,11 @@
           "description": "Discovery status of the deployment instance",
           "type": "string",
           "readOnly": true
+        },
+        "startTime": {
+          "description": "Start time of the deployment instance",
+          "type": "string",
+          "readOnly": true
         }
       }
     },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_CreateOrUpdate.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_CreateOrUpdate.json
index 2489871bbda5..786a5f55af53 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_CreateOrUpdate.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_CreateOrUpdate.json
@@ -59,7 +59,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },
@@ -99,7 +100,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },
@@ -139,7 +141,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_Get.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_Get.json
index 324184fe6f9a..9a999a403ffc 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_Get.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_Get.json
@@ -34,7 +34,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_List.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_List.json
index e9475cc25708..35ff6dcf1ee7 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_List.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_List.json
@@ -35,7 +35,8 @@
                 {
                   "name": "instance1",
                   "status": "Running",
-                  "discoveryStatus": "pending"
+                  "discoveryStatus": "pending",
+                  "startTime": "2020-08-26T01:55:02Z"
                 }
               ]
             },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_ListForCluster.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_ListForCluster.json
index e9475cc25708..35ff6dcf1ee7 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_ListForCluster.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_ListForCluster.json
@@ -35,7 +35,8 @@
                 {
                   "name": "instance1",
                   "status": "Running",
-                  "discoveryStatus": "pending"
+                  "discoveryStatus": "pending",
+                  "startTime": "2020-08-26T01:55:02Z"
                 }
               ]
             },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_Update.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_Update.json
index 1afc9a09b985..18c9f75950da 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_Update.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/examples/Deployments_Update.json
@@ -45,7 +45,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },
@@ -85,7 +86,8 @@
             {
               "name": "instance1",
               "status": "Running",
-              "discoveryStatus": "pending"
+              "discoveryStatus": "pending",
+              "startTime": "2020-08-26T01:55:02Z"
             }
           ]
         },