diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2019-03-01/actionGroups_API.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2019-03-01/actionGroups_API.json
index 37a6c7dd628d..f7bf2ef3138b 100644
--- a/specification/monitor/resource-manager/Microsoft.Insights/stable/2019-03-01/actionGroups_API.json
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2019-03-01/actionGroups_API.json
@@ -516,6 +516,7 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         },
         "status": {
@@ -526,8 +527,7 @@
       },
       "required": [
         "name",
-        "emailAddress",
-        "useCommonAlertSchema"
+        "emailAddress"
       ]
     },
     "SmsReceiver": {
@@ -570,13 +570,13 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         }
       },
       "required": [
         "name",
-        "serviceUri",
-        "useCommonAlertSchema"
+        "serviceUri"
       ]
     },
     "ItsmReceiver": {
@@ -657,6 +657,7 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         }
       },
@@ -664,8 +665,7 @@
         "automationAccountId",
         "runbookName",
         "webhookResourceId",
-        "isGlobalRunbook",
-        "useCommonAlertSchema"
+        "isGlobalRunbook"
       ]
     },
     "VoiceReceiver": {
@@ -707,14 +707,14 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         }
       },
       "required": [
         "name",
         "resourceId",
-        "callbackUrl",
-        "useCommonAlertSchema"
+        "callbackUrl"
       ]
     },
     "AzureFunctionReceiver": {
@@ -738,6 +738,7 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         }
       },
@@ -745,8 +746,7 @@
         "name",
         "functionAppResourceId",
         "functionName",
-        "httpTriggerUrl",
-        "useCommonAlertSchema"
+        "httpTriggerUrl"
       ]
     },
     "ArmRoleReceiver": {
@@ -762,13 +762,13 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         }
       },
       "required": [
         "name",
-        "roleId",
-        "useCommonAlertSchema"
+        "roleId"
       ]
     },
     "ReceiverStatus": {
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2019-06-01/actionGroups_API.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2019-06-01/actionGroups_API.json
index 519fa09d498a..edaa8dbf5028 100644
--- a/specification/monitor/resource-manager/Microsoft.Insights/stable/2019-06-01/actionGroups_API.json
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2019-06-01/actionGroups_API.json
@@ -516,6 +516,7 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         },
         "status": {
@@ -526,8 +527,7 @@
       },
       "required": [
         "name",
-        "emailAddress",
-        "useCommonAlertSchema"
+        "emailAddress"
       ]
     },
     "SmsReceiver": {
@@ -570,6 +570,7 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         },
         "useAadAuth": {
@@ -592,8 +593,7 @@
       },
       "required": [
         "name",
-        "serviceUri",
-        "useCommonAlertSchema"
+        "serviceUri"
       ]
     },
     "ItsmReceiver": {
@@ -674,6 +674,7 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         }
       },
@@ -681,8 +682,7 @@
         "automationAccountId",
         "runbookName",
         "webhookResourceId",
-        "isGlobalRunbook",
-        "useCommonAlertSchema"
+        "isGlobalRunbook"
       ]
     },
     "VoiceReceiver": {
@@ -724,14 +724,14 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         }
       },
       "required": [
         "name",
         "resourceId",
-        "callbackUrl",
-        "useCommonAlertSchema"
+        "callbackUrl"
       ]
     },
     "AzureFunctionReceiver": {
@@ -755,6 +755,7 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         }
       },
@@ -762,8 +763,7 @@
         "name",
         "functionAppResourceId",
         "functionName",
-        "httpTriggerUrl",
-        "useCommonAlertSchema"
+        "httpTriggerUrl"
       ]
     },
     "ArmRoleReceiver": {
@@ -779,13 +779,13 @@
         },
         "useCommonAlertSchema": {
           "type": "boolean",
+          "default": false,
           "description": "Indicates whether to use common alert schema."
         }
       },
       "required": [
         "name",
-        "roleId",
-        "useCommonAlertSchema"
+        "roleId"
       ]
     },
     "ReceiverStatus": {