diff --git a/lib/services/monitorManagement/lib/models/index.d.ts b/lib/services/monitorManagement/lib/models/index.d.ts
index a004e3aa8f..b77dd1d7aa 100644
--- a/lib/services/monitorManagement/lib/models/index.d.ts
+++ b/lib/services/monitorManagement/lib/models/index.d.ts
@@ -78,7 +78,8 @@ export interface ScaleCapacity {
  * hours and 5 minutes.
  * @member {string} timeAggregation time aggregation type. How the data that is
  * collected should be combined over time. The default value is Average.
- * Possible values include: 'Average', 'Minimum', 'Maximum', 'Total', 'Count'
+ * Possible values include: 'Average', 'Minimum', 'Maximum', 'Total', 'Count',
+ * 'Last'
  * @member {string} operator the operator that is used to compare the metric
  * data and the threshold. Possible values include: 'Equals', 'NotEquals',
  * 'GreaterThan', 'GreaterThanOrEqual', 'LessThan', 'LessThanOrEqual'
@@ -147,7 +148,7 @@ export interface ScaleAction {
  * @member {string} [metricTrigger.timeAggregation] time aggregation type. How
  * the data that is collected should be combined over time. The default value
  * is Average. Possible values include: 'Average', 'Minimum', 'Maximum',
- * 'Total', 'Count'
+ * 'Total', 'Count', 'Last'
  * @member {string} [metricTrigger.operator] the operator that is used to
  * compare the metric data and the threshold. Possible values include:
  * 'Equals', 'NotEquals', 'GreaterThan', 'GreaterThanOrEqual', 'LessThan',
diff --git a/lib/services/monitorManagement/lib/models/metricTrigger.js b/lib/services/monitorManagement/lib/models/metricTrigger.js
index 09e76603e5..2da56fd24d 100644
--- a/lib/services/monitorManagement/lib/models/metricTrigger.js
+++ b/lib/services/monitorManagement/lib/models/metricTrigger.js
@@ -33,7 +33,8 @@ class MetricTrigger {
    * hours and 5 minutes.
    * @member {string} timeAggregation time aggregation type. How the data that
    * is collected should be combined over time. The default value is Average.
-   * Possible values include: 'Average', 'Minimum', 'Maximum', 'Total', 'Count'
+   * Possible values include: 'Average', 'Minimum', 'Maximum', 'Total',
+   * 'Count', 'Last'
    * @member {string} operator the operator that is used to compare the metric
    * data and the threshold. Possible values include: 'Equals', 'NotEquals',
    * 'GreaterThan', 'GreaterThanOrEqual', 'LessThan', 'LessThanOrEqual'
@@ -98,7 +99,7 @@ class MetricTrigger {
             serializedName: 'timeAggregation',
             type: {
               name: 'Enum',
-              allowedValues: [ 'Average', 'Minimum', 'Maximum', 'Total', 'Count' ]
+              allowedValues: [ 'Average', 'Minimum', 'Maximum', 'Total', 'Count', 'Last' ]
             }
           },
           operator: {
diff --git a/lib/services/monitorManagement/lib/models/scaleRule.js b/lib/services/monitorManagement/lib/models/scaleRule.js
index beda6ba5a8..5260a6d2db 100644
--- a/lib/services/monitorManagement/lib/models/scaleRule.js
+++ b/lib/services/monitorManagement/lib/models/scaleRule.js
@@ -37,7 +37,7 @@ class ScaleRule {
    * @member {string} [metricTrigger.timeAggregation] time aggregation type.
    * How the data that is collected should be combined over time. The default
    * value is Average. Possible values include: 'Average', 'Minimum',
-   * 'Maximum', 'Total', 'Count'
+   * 'Maximum', 'Total', 'Count', 'Last'
    * @member {string} [metricTrigger.operator] the operator that is used to
    * compare the metric data and the threshold. Possible values include:
    * 'Equals', 'NotEquals', 'GreaterThan', 'GreaterThanOrEqual', 'LessThan',
diff --git a/lib/services/monitorManagement/package.json b/lib/services/monitorManagement/package.json
index 7d9aa13beb..bcbf89ca5d 100644
--- a/lib/services/monitorManagement/package.json
+++ b/lib/services/monitorManagement/package.json
@@ -2,7 +2,7 @@
   "name": "azure-arm-monitor",
   "author": "Microsoft Corporation",
   "description": "MonitorManagementClient Library with typescript type definitions for node",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "dependencies": {
     "ms-rest": "^2.3.3",
     "ms-rest-azure": "^2.5.5"