diff --git a/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesCreateEventHub.json b/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesCreateEventHub.json
index 7e26c29ba56a..f4f975129574 100644
--- a/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesCreateEventHub.json
+++ b/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesCreateEventHub.json
@@ -15,6 +15,12 @@
         "keyName": "managementKey",
         "sharedAccessKey": "someSecretvalue",
         "timestampPropertyName": "someTimestampProperty",
+        "localTimestamp": {
+          "format": "TimeSpan",
+          "timeZoneOffset": {
+            "propertyName": "someEventPropertyName"
+          }
+        },
         "ingressStartAt": {
           "type": "EarliestAvailable"
         }
@@ -39,6 +45,12 @@
           "keyName": "managementKey",
           "provisioningState": "Succeeded",
           "creationTime": "2017-04-18T19:20:33.2288820Z",
+          "localTimestamp": {
+            "format": "TimeSpan",
+            "timeZoneOffset": {
+              "propertyName": "someEventPropertyName"
+            }
+          },
           "ingressStartAt": {
             "type": "EarliestAvailable"
           }
@@ -61,6 +73,12 @@
           "keyName": "managementKey",
           "provisioningState": "Succeeded",
           "creationTime": "2017-04-18T19:20:33.2288820Z",
+          "localTimestamp": {
+            "format": "TimeSpan",
+            "timeZoneOffset": {
+              "propertyName": "someEventPropertyName"
+            }
+          },
           "ingressStartAt": {
             "type": "EarliestAvailable"
           }
diff --git a/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesGetEventHub.json b/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesGetEventHub.json
index 8f36cdfadf48..652e5ae11835 100644
--- a/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesGetEventHub.json
+++ b/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesGetEventHub.json
@@ -23,6 +23,12 @@
           "keyName": "managementKey",
           "provisioningState": "Succeeded",
           "creationTime": "2017-04-18T19:20:33.2288820Z",
+          "localTimestamp": {
+            "format": "TimeSpan",
+            "timeZoneOffset": {
+              "propertyName": "someEventPropertyName"
+            }
+          },
           "ingressStartAt": {
             "type": "EarliestAvailable"
           }
diff --git a/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesListByEnvironment.json b/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesListByEnvironment.json
index 5201d9baafcf..2a05758b173a 100644
--- a/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesListByEnvironment.json
+++ b/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesListByEnvironment.json
@@ -24,6 +24,12 @@
               "keyName": "managementKey",
               "provisioningState": "Succeeded",
               "creationTime": "2017-04-18T19:20:33.2288820Z",
+              "localTimestamp": {
+                "format": "TimeSpan",
+                "timeZoneOffset": {
+                  "propertyName": "someEventPropertyName"
+                }
+              },
               "ingressStartAt": {
                 "type": "EarliestAvailable"
               }
diff --git a/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesPatchTags.json b/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesPatchTags.json
index fc2c6b53920c..1e86b5be3c74 100644
--- a/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesPatchTags.json
+++ b/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/examples/EventSourcesPatchTags.json
@@ -31,6 +31,12 @@
           "provisioningState": "Succeeded",
           "creationTime": "2017-04-18T19:20:33.2288820Z",
           "timestampPropertyName": "someOtherTimestampProperty",
+          "localTimestamp": {
+            "format": "TimeSpan",
+            "timeZoneOffset": {
+              "propertyName": "someEventPropertyName"
+            }
+          },
           "ingressStartAt": {
             "type": "EarliestAvailable"
           }
diff --git a/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/timeseriesinsights.json b/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/timeseriesinsights.json
index f41cffee5c2c..ff49d958ffc6 100644
--- a/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/timeseriesinsights.json
+++ b/specification/timeseriesinsights/resource-manager/Microsoft.TimeSeriesInsights/stable/2020-05-15/timeseriesinsights.json
@@ -1144,6 +1144,99 @@
               "readOnly": true
             }
           }
+        },
+        "origin": {
+          "title": "The intended executor of the operation.",
+          "type": "string"
+        },
+        "properties": {
+          "title": "Properties of the operation, including metric specifications.",
+          "type": "object",
+          "x-ms-client-flatten": true,
+          "x-ms-client-name": "OperationProperties",
+          "$ref": "#/definitions/OperationProperties"
+        }
+      }
+    },
+    "OperationProperties": {
+      "description": "Properties of operation, include metric specifications.",
+      "type": "object",
+      "properties": {
+        "serviceSpecification": {
+          "$ref": "#/definitions/ServiceSpecification",
+          "description": "One property of operation, include metric specifications."
+        }
+      }
+    },
+    "ServiceSpecification": {
+      "description": "One property of operation, include metric specifications.",
+      "type": "object",
+      "properties": {
+        "metricSpecifications": {
+          "description": "Metric specifications of operation.",
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/MetricSpecification"
+          }
+        }
+      }
+    },
+    "MetricSpecification": {
+      "description": "Metric specification of operation.",
+      "type": "object",
+      "properties": {
+        "name": {
+          "type": "string",
+          "description": "Name of metric specification."
+        },
+        "displayName": {
+          "type": "string",
+          "description": "Display name of metric specification."
+        },
+        "displayDescription": {
+          "type": "string",
+          "description": "Display description of metric specification."
+        },
+        "unit": {
+          "type": "string",
+          "description": "Unit could be Bytes or Count."
+        },
+        "dimensions": {
+          "description": "Dimensions of blobs, including blob type and access tier.",
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/Dimension"
+          }
+        },
+        "aggregationType": {
+          "type": "string",
+          "description": "Aggregation type could be Average."
+        },
+        "fillGapWithZero": {
+          "type": "boolean",
+          "description": "The property to decide fill gap with zero or not."
+        },
+        "category": {
+          "type": "string",
+          "description": "The category this metric specification belong to, could be Capacity."
+        },
+        "resourceIdDimensionNameOverride": {
+          "type": "string",
+          "description": "Account Resource Id."
+        }
+      }
+    },
+    "Dimension": {
+      "description": "Dimension of blobs, possibly be blob type or access tier.",
+      "type": "object",
+      "properties": {
+        "name": {
+          "type": "string",
+          "description": "Display name of dimension."
+        },
+        "displayName": {
+          "type": "string",
+          "description": "Display name of dimension."
         }
       }
     },
@@ -1353,7 +1446,11 @@
           "x-ms-enum": {
             "name": "EnvironmentKind",
             "modelAsString": true
-          }
+          },
+          "x-ms-mutability": [
+            "create",
+            "read"
+          ]
         },
         "sku": {
           "$ref": "#/definitions/Sku",
@@ -2077,6 +2174,10 @@
           "type": "string",
           "description": "The event property that will be used as the event source's timestamp. If a value isn't specified for timestampPropertyName, or if null or empty-string is specified, the event creation time will be used."
         },
+        "localTimestamp": {
+          "$ref": "#/definitions/LocalTimestamp",
+          "description": "An object that represents the local timestamp property. It contains the format of local timestamp that needs to be used and the corresponding timezone offset information. If a value isn't specified for localTimestamp, or if null, then the local timestamp will not be ingressed with the events."
+        },
         "ingressStartAt": {
           "x-ms-client-flatten": true,
           "$ref": "#/definitions/IngressStartAtProperties",
@@ -2250,10 +2351,6 @@
         "timestampPropertyName": {
           "type": "string",
           "description": "The event property that will be used as the event source's timestamp. If a value isn't specified for timestampPropertyName, or if null or empty-string is specified, the event creation time will be used."
-        },
-        "localTimestamp": {
-          "$ref": "#/definitions/LocalTimestamp",
-          "description": "An object that represents the local timestamp property. It contains the format of local timestamp that needs to be used and the corresponding timezone offset information. If a value isn't specified for localTimestamp, or if null, then the local timestamp will not be ingressed with the events."
         }
       }
     },
@@ -2455,7 +2552,11 @@
       "properties": {
         "principalObjectId": {
           "type": "string",
-          "description": "The objectId of the principal in Azure Active Directory."
+          "description": "The objectId of the principal in Azure Active Directory.",
+          "x-ms-mutability": [
+            "create",
+            "read"
+          ]
         },
         "description": {
           "type": "string",