---
sourceDocument: Australia API Reference
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/api-reference

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    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia API Reference

ft:clusterId :

    - crapiref

bundleId :

    - crapiref

workflow :

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---

# Create outbound Order Management notifications using the open message bus

# Create outbound Order Management notifications using the open message bus {#ariaid-title1}

Release version: Australia  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
Learn how to produce an outbound notification from a ServiceNow® instance using the open message bus. Customers can consume the details of the notification from the message bus in their external system.

## Introduction to outbound order management notifications {#eventMgmtNotif-use-open-mssg-bus__section_rxx_1pl_mhc}

In this event-driven architecture, notifications are produced to the open message bus from your ServiceNow® instance. The framework contains topic synchronization and topic picker mechanisms. The topic synchronization mechanism synchronizes the topics that you have created in the instance
containing the open message bus. When the event occurs in the framework, the topic picker mechanism picks the relevant topic and publishes the message to the topic using a REST proxy. Customers can consume the outbound
notification from the message bus in their external system.

## Supported Order Management events

The following events are supported for Order management notification.  
Product Order Management:

1. CancelProductOrderCreateEvent
2. CancelProductOrderStateChangeEvent
3. ProductOrderCreateEvent
4. ProductOrderDeleteEvent
5. ProductOrderJeoperdyAlertEvent
6. ProductOrderStateChangeEvent
{#eventMgmtNotif-use-open-mssg-bus__ol_ihk_fpl_mhc}  
Service Order Management:

1. CancelServiceOrderCreateEvent
2. CancelServiceOrderStateChangeEvent
3. ServiceOrderCreateEvent
4. ServiceOrderDeleteEvent
5. ServiceOrderJeoperdyAlertEvent
6. ServiceOrderStateChangeEvent
{#eventMgmtNotif-use-open-mssg-bus__ol_w43_jpl_mhc}

## Prerequisites

Before producing outbound notifications, it's necessary to create the egress topics in the Topic \[sn_api_notif_mgmt_topic\] table in the ServiceNow® instance. When you create an egress topic, the system runs a business rule and attempts to synchronize the topic to the message bus based on configuration. To learn more about manually
creating a topic in the Topic table, see [Create a topic](https://www.servicenow.com/docs/access?context=create-topic-API-notification&version=australia&pubname=australia-telecom-service-ops&ft:locale=en-US). The system synchronizes only the egress topic with the message bus in the external system. The `user_created` field in the associated topic record is
set to `true`.

Alternatively, you can create the topics on the message bus in your external system and push them into the Topic table in ServiceNow® instance. To do this, invoke the [Event Management Topic Open API](https://servicenow-prod.fluidtopics.net/NniE67hDuP4itjq3vf2GMw#event_management_topic-api "The Event Management Topic Open API provides an endpoint that enables you to send a topic through your message broker and store it on a ServiceNow instance.") endpoint, which stores the topic in the Topic \[sn_api_notif_mgmt_topic\] table of the instance. The user_created field in the associated topic record is set to false.