diff --git a/internal/services/apimanagement/api_management_api_diagnostic_resource.go b/internal/services/apimanagement/api_management_api_diagnostic_resource.go
index 895f630fe5f8..7d1e9d3076b4 100644
--- a/internal/services/apimanagement/api_management_api_diagnostic_resource.go
+++ b/internal/services/apimanagement/api_management_api_diagnostic_resource.go
@@ -187,11 +187,14 @@ func resourceApiManagementApiDiagnosticCreateUpdate(d *pluginsdk.ResourceData, m
 
 	parameters := apidiagnostic.DiagnosticContract{
 		Properties: &apidiagnostic.DiagnosticContractProperties{
-			LoggerId:            d.Get("api_management_logger_id").(string),
-			OperationNameFormat: pointer.To(apidiagnostic.OperationNameFormat(d.Get("operation_name_format").(string))),
+			LoggerId: d.Get("api_management_logger_id").(string),
 		},
 	}
 
+	if d.Get("identifier") == "applicationinsights" {
+		parameters.Properties.OperationNameFormat = pointer.To(apidiagnostic.OperationNameFormat(d.Get("operation_name_format").(string)))
+	}
+
 	samplingPercentage := d.GetRawConfig().AsValueMap()["sampling_percentage"]
 	if !samplingPercentage.IsNull() {
 		parameters.Properties.Sampling = &apidiagnostic.SamplingSettings{