diff --git a/specification/alertsmanagement/resource-manager/Microsoft.AlertsManagement/preview/2023-05-01-preview/examples/AlertProcessingRules_Create_or_update_add_correlation.json b/specification/alertsmanagement/resource-manager/Microsoft.AlertsManagement/preview/2023-05-01-preview/examples/AlertProcessingRules_Create_or_update_add_correlation.json
index 843fdfe1a456..8fde816481be 100644
--- a/specification/alertsmanagement/resource-manager/Microsoft.AlertsManagement/preview/2023-05-01-preview/examples/AlertProcessingRules_Create_or_update_add_correlation.json
+++ b/specification/alertsmanagement/resource-manager/Microsoft.AlertsManagement/preview/2023-05-01-preview/examples/AlertProcessingRules_Create_or_update_add_correlation.json
@@ -19,7 +19,7 @@
                 "field": "essentials.alertRule"
               }
             ],
-            "correlationInterval": "00:30:00",
+            "correlationInterval": "PT30M",
             "priority": 50,
             "notificationsForCorrelatedAlerts": "SuppressAlways"
           }
@@ -52,7 +52,7 @@
                   "field": "essentials.alertRule"
                 }
               ],
-              "correlationInterval": "00:30:00",
+              "correlationInterval": "PT30M",
               "priority": 50,
               "notificationsForCorrelatedAlerts": "SuppressAlways"
             }
@@ -89,7 +89,7 @@
                   "field": "essentials.alertRule"
                 }
               ],
-              "correlationInterval": "00:30:00",
+              "correlationInterval": "PT30M",
               "priority": 50,
               "notificationsForCorrelatedAlerts": "SuppressAlways"
             }