diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/ContainerAppsRevisions.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/ContainerAppsRevisions.json
index 5ac279e1e77d..c121194f76ad 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/ContainerAppsRevisions.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/ContainerAppsRevisions.json
@@ -409,6 +409,12 @@
               "type": "string",
               "readOnly": true
             },
+            "lastActiveTime": {
+              "format": "date-time",
+              "description": "Timestamp describing when the revision was last active. Only meaningful when revision is inactive",
+              "type": "string",
+              "readOnly": true
+            },
             "fqdn": {
               "description": "Fully qualified domain name of the revision",
               "type": "string",
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Revisions_Get.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Revisions_Get.json
index 98063fc987eb..a0bacc0e6974 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Revisions_Get.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Revisions_Get.json
@@ -15,6 +15,7 @@
         "type": "Microsoft.App/containerApps/revisions",
         "properties": {
           "createdTime": "2021-05-24T21:24:22+00:00",
+          "lastActiveTime": "2021-05-24T21:24:22+00:00",
           "fqdn": "testcontainerApp0-pjxhsye.politehill-ab123456.eastus.azurecontainerapps.io",
           "template": {
             "containers": [
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Revisions_List.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Revisions_List.json
index cc1f1eea33c9..3d324514a55e 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Revisions_List.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Revisions_List.json
@@ -16,6 +16,7 @@
             "type": "Microsoft.App/containerApps/revisions",
             "properties": {
               "createdTime": "2021-05-24T21:24:22+00:00",
+              "lastActiveTime": "2021-05-24T21:24:22+00:00",
               "fqdn": "testcontainerApp0-pjxhsye.politehill-ab123456.eastus.azurecontainerapps.io",
               "template": {
                 "containers": [