---
schema_version: "1"
id: cd3c278c2568047e7ddf205605a91101b20778dbfb7df916e9c62e5fe78c8a4a
title: Event Notification Service
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_overview_ens.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_overview_ens.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 44a607fc28ae4b5c693fbfcd54928363b3a08ddde81d309fc4f789341e558420
description: Use the Event Notification Service (ENS) to receive notifications for your own system when certain events occur in Marketing Cloud Engagement. You can be notified when customers request password resets, get order confirmations, log in using multi-factor authentication (MFA), and other events. You can also subscribe to email engagement events, such as opens, clicks, and unsubscribes. And you can subscribe to automation alerts, such as when an automation starts, finishes, or errors.
products:
  - Marketing
  - Marketing Cloud Engagement
release: "264"
---
# Event Notification Service

Use the Event Notification Service (ENS) to receive notifications for your own system when certain events occur in Marketing Cloud Engagement. You can be notified when customers request password resets, get order confirmations, log in using multi-factor authentication (MFA), and other events. You can also subscribe to email engagement events, such as opens, clicks, and unsubscribes. And you can subscribe to automation alerts, such as when an automation starts, finishes, or errors.

For example, Northern Trail Outfitters, or NTO, requests that Marketing Cloud Engagement sends an online order confirmation email to a customer. The customer’s email address isn’t valid, so the ENS notifies NTO almost immediately that the order confirmation bounced. Using that feedback, NTO’s system sends the customer the order confirmation via SMS instead. When the user provides a valid email address, NTO can track clicks and opens from further email communications.

![Important](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-mktg-mc_marketing_cloud_overview-264-0-0-production-enus/2555afdb-8049-4e3c-8043-0e04803e5f16/images/icon_important.png)

Important Implement the ENS as outlined in Get Started with Event Notification Service.

[Add the appropriate addresses](https://help.salesforce.com/s/articleView?id=mktg.mc_es_ip_addresses_for_inclusion.htm&release=264.0.0&type=5 "Add the Salesforce IP address to your allowlists so that your users can process login authentication requests. Allowing the entire set of IP addresses avoids unintended service disruptions caused by movement between primary and secondary instances.") to your event listener allowlist for Event Notification Services. To view ENS in Marketing Cloud Engagement, turn on these user permissions under Event Notifications.

- Callbacks
    - View
- Subscriptions
    - View

To view and edit ENS in Marketing Cloud Engagement, turn on these user permissions under Event Notifications.

- Callbacks
    - Create
    - View
    - Update
    - Delete
- Subscriptions
    - Create
    - View
    - Update
    - Delete

## Alert Manager Notification for ENS

The Alert Manager notifies you if your callback URL isn’t accepting attempts to deliver a batch notification event. Alerts are bundled together so that you receive only one notification email every 5 hours.

- **[Get Started with Event Notification Service](https://help.salesforce.com/s/articleView?id=mktg.mc_overview_ens_get_started.htm&release=264.0.0&type=5)**  
    Configure your system to work with the Event Notification Service (ENS) in Marketing Cloud Engagement. The configuration process registers the callbacks and creates the subscriptions used to interact with your external system.
- **[Register a New Callback for Event Notifications](https://help.salesforce.com/s/articleView?id=mktg.mc_overview_ens_register_callback.htm&release=264.0.0&type=5)**  
    Follow these steps to register a new callback for event notifications in Marketing Cloud Engagement.
- **[Create a Subscription for Event Notifications](https://help.salesforce.com/s/articleView?id=mktg.mc_overview_ens_subscribe.htm&release=264.0.0&type=5)**  
    Follow these steps to create a subscription for event notifications in Marketing Cloud Engagement.
- **[Delete a Callback for Event Notifications](https://help.salesforce.com/s/articleView?id=mktg.mc_overview_ens_delete_callback.htm&release=264.0.0&type=5)**  
    Follow these steps to delete a subscription to event notifications in Marketing Cloud Engagement.
- **[Delete a Subscription for Event Notifications](https://help.salesforce.com/s/articleView?id=mktg.mc_overview_ens_delete_sub.htm&release=264.0.0&type=5)**  
    Follow these steps to delete a subscription to event notifications in Marketing Cloud Engagement.