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title Handle Service Bus Events Using Event Grid Using Azure Logic Apps
description This article provides steps for handling Service Bus events by using Event Grid using Azure Logic Apps.
author spelluru
ms.topic tutorial
ms.date 06/19/2025
ms.author spelluru
ms.custom sfi-image-nochange

Tutorial: Respond to Azure Service Bus events received using Azure Event Grid by using Azure Logic Apps

In this tutorial, you learn how to respond to Azure Service Bus events that are received using Azure Event Grid by using Azure Logic Apps.

[!INCLUDE service-bus-event-grid-prerequisites]

Receive messages by using Logic Apps

In this section, create an Azure logic app that receives Service Bus events by using Azure Event Grid.

  1. Select + Create a resource, select Integration, and then select Logic App.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/create-resource-logic-app.png" alt-text="Screenshot that shows the Create a resource > Integration > Logic app menu.":::

  2. On the Create Logic App page, follow these steps:

    1. Select the Consumption > Multi-tenant option, then choose Select.

    2. Select your Azure Subscription.

    3. Enter a Resource Group. Select the resource group that you used for other resources, like the Service Bus namespace, that you created earlier.

    4. Enter a name for the logic app.

    5. Select the Region for the logic app.

    6. Select Review + Create.

      :::image type="content" source="./media/service-bus-to-event-grid-integration-example/create-logic-app-page.png" alt-text="Screenshot that shows the Create a logic app page.":::

    7. On the Review + Create page, select Create to create the logic app.

  3. On the Deployment complete page, select Go to resource to navigate to the Logic app page.

Add a step receive messages from Service Bus using Event Grid

  1. Expand Development Tools and select Logic app templates.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/select-blank-logic-app.png" alt-text="Screenshot that shows the Logic app designer page with the Blank workflow option selected." lightbox="./media/service-bus-to-event-grid-integration-example/select-blank-logic-app.png":::

  2. Select Blank workflow. The Logic app designer opens.

  3. On the designer, do the following steps:

    1. Select Add a trigger and then search for Event Grid.

    2. Select When a resource event occurs.

      :::image type="content" source="./media/service-bus-to-event-grid-integration-example/logic-apps-event-grid-trigger.png" alt-text="Screenshot that shows the Logic Apps Designer with Event Grid trigger selected.":::

  4. Select Sign in.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/designer-credentials.png" alt-text="Screenshot that shows the Logic Apps Designer with the Sign in button selected.":::

  5. On the Sign in to your account page, select the account you want to use to sign in to Azure.

  6. On the When a resource event occurs page, do the following steps:

    1. For Resource Type, select Microsoft.ServiceBus.Namespaces.

    2. Select your Azure subscription.

    3. For Resource Name, select your Service Bus namespace.

    4. Under Advanced parameters, select the down arrow.

    5. Select Suffix Filter, and then move the focus outside dropdown list.

      :::image type="content" source="./media/service-bus-to-event-grid-integration-example/add-new-parameter-suffix-filter.png" alt-text="Screenshot that shows adding of a new parameter of type Suffix filter.":::

    6. For Suffix Filter, enter the name of your Service Bus topic subscription.

      :::image type="content" source="./media/service-bus-to-event-grid-integration-example/suffix-filter.png" alt-text="Screenshot that shows the Logic Apps Designer with connection configuration for the Service Bus namespace.":::

  7. Select the + sign, then select Add an action.

    1. Search for Service Bus.

      :::image type="content" source="./media/service-bus-to-event-grid-integration-example/select-service-bus.png" alt-text="Screenshot that shows the selection of Service Bus.":::

    2. Select See more and then select Get messages from a topic subscription (peek-lock).

      :::image type="content" source="./media/service-bus-to-event-grid-integration-example/service-bus-get-messages-step.png" alt-text="Screenshot that shows the Logic Apps Designer with Get messages from a topic subscription selected.":::

    3. Follow these steps:

      1. Enter a name for the connection. For example: Get messages from the topic subscription.

      2. Confirm that Authentication Type is set to Access Key.

      3. For Connection String, copy and paste the connection string to the Service Bus namespace that you saved earlier.

      4. Select Create new.

        :::image type="content" source="./media/service-bus-to-event-grid-integration-example/logic-app-shared-access-key.png" alt-text="Screenshot that shows the Logic Apps Designer with the Service Bus connection string specified.":::

    4. Select your topic and subscription.

      :::image type="content" source="./media/service-bus-to-event-grid-integration-example/specify-topic-subscription.png" alt-text="Screenshot that shows the Logic Apps Designer with the Service Bus topic and subscription specified.":::

Add a step to process and complete received messages

In this section, you add steps to send the received message in an email and then complete the message. In a real-world scenario, you process a message in the logic app before completing the message.

Add a foreach loop

  1. Select the + sign, then select Add an action.

  2. Search for and then select For each.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/select-for-each.png" alt-text="Screenshot that shows the For-each operation selected.":::

  3. For Select an output from previous steps, select the lightning bolt or enter / and select Insert dynamic content.

  4. Select Body under Get messages from a topic subscription (peek-lock).

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/select-input-for-each.png" alt-text="Screenshot that shows the selection of For each input." lightbox="./media/service-bus-to-event-grid-integration-example/select-input-for-each.png":::

Add a step inside the foreach loop to send an email with the message body

  1. In the For Each loop, select +, then select Add an action.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/select-add-action.png" alt-text="Screenshot that shows the selection of + button in the For-each loop.":::

  2. Search for Office 365 and then select See more.

  3. Select Office 365 Outlook in the search results.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/select-office-365.png" alt-text="Screenshot that shows the selection of Office 365.":::

  4. In the list of actions, select Send an email (V2).

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/select-send-email.png" alt-text="Screenshot that shows the selection of Send an email operation.":::

  5. Select Sign in, and follow steps to create a connection to Office 365 Outlook.

  6. In the Send an email (V2) window, follow these steps:

  7. Select inside the text box for Body, and follow these steps:

    1. For To, enter an email address.

    2. For Subject, enter Message received from Service Bus topic's subscription.

    3. In the Body, select the expression or enter / and select Insert expression.

    4. Enter the following expression:

      base64ToString(items('For_each')?['ContentData'])

    5. Select Add.

      :::image type="content" source="./media/service-bus-to-event-grid-integration-example/specify-expression-email.png" alt-text="Screenshot that shows the expression for Body of the Send an email activity.":::

Add another action in the foreach loop to complete the message

  1. In the For Each loop, select +, then select Add an action.

    1. Search for Service Bus.

    2. Select Complete the message in a topic subscription from the list of actions.

      :::image type="content" source="./media/service-bus-to-event-grid-integration-example/select-complete-message.png" alt-text="Screenshot that shows the selection of Complete a message in a topic subscription.":::

    3. Select your Service Bus topic.

    4. Select a subscription to the topic.

    5. In Lock Token Of The Message, select the expression or enter / and select Insert expression.

    6. Select Dynamic content and the select Lock Token. Select Add.

      :::image type="content" source="./media/service-bus-to-event-grid-integration-example/logic-app-complete-message.png" lightbox="./media/service-bus-to-event-grid-integration-example/logic-app-complete-message.png" alt-text="Screenshot that shows the lock token field.":::

  2. Select Save on the toolbar on the Logic Apps Designer to save the logic app.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/save-logic-app.png" alt-text="Screenshot that shows the Save button in the Logic app designed.":::

Test the app

  1. If you haven't already sent test messages to the topic, follow instructions in the Send messages to the Service Bus topic section to send messages to the topic.

  2. Navigate to the Overview page of your logic app. Then select the Run history tab in the bottom pane. You see the logic app runs messages that were sent to the topic. It could take a few minutes before you see the logic app runs. Select Refresh on the toolbar to refresh the page.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/logic-app-runs.png" alt-text="Screenshot that shows the Logic app run history." lightbox="./media/service-bus-to-event-grid-integration-example/logic-app-runs.png":::

  3. Select a logic app run to see the details. Notice that it processed five messages in the for loop.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/logic-app-run-details.png" alt-text="Screenshot that shows the details for the selected logic app run.":::

  4. You should get an email for each message the logic app receives.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/received-messages.png" alt-text="Screenshot of Outlook with the messages received from the topics subscription." lightbox="./media/service-bus-to-event-grid-integration-example/received-messages.png":::

Troubleshoot

If you don't see any invocations after waiting and refreshing for sometime, follow these steps:

  1. Confirm that the messages reached the Service Bus topic. See the incoming messages counter on the Service Bus Topic page. In this case, the MessageSender application runs once, so there are 5 messages.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/topic-incoming-messages.png" alt-text="Screenshot that shows the Service Bus Topic page with incoming message count selected." lightbox="./media/service-bus-to-event-grid-integration-example/topic-incoming-messages.png":::

  2. Confirm that there are no active messages at the Service Bus subscription.

    If you don't see any events on this page, verify that the Service Bus Subscription page doesn't show any Active message count. If the number for this counter is greater than zero, the messages at the subscription aren't forwarded to the handler function (event subscription handler) for some reason. Verify that you set up the event subscription properly.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/subscription-active-message-count.png" alt-text="Screenshot that shows the Service Bus Subscription page with the active message count selected." lightbox="./media/service-bus-to-event-grid-integration-example/subscription-active-message-count.png":::

  3. You also see delivered events on the Events page of the Service Bus namespace.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/event-subscription-page.png" alt-text="Screenshot that shows the Events page of the Service Bus Namespace page." lightbox="./media/service-bus-to-event-grid-integration-example/event-subscription-page.png":::

  4. You can also see that the events are delivered on the Event Subscription page. You can get to this page by selecting the event subscription on the Events page.

    :::image type="content" source="./media/service-bus-to-event-grid-integration-example/event-subscription-delivered-events.png" alt-text="Screenshot that shows the Event Subscription page with the delivered event count selected." lightbox="./media/service-bus-to-event-grid-integration-example/event-subscription-delivered-events.png":::

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