push notifications not working with Azure Notification Hubs and Google Firebase Cloud Messaging migration

Question

I have developed ionic capacitor app for push notifications with recent changes Azure Notification Hubs and Google Firebase Cloud Messaging migration all the setup according to documentation provided but i could not see my device is registerd over the azure notification hub but from the ionic app i was able get the device token and can see registration succesful need a solution for thus

Answer 1

Hi Ashwitha Gudala
Welcome to the Microsoft Q&A Platform!
The issue likely lies in the integration between your Ionic app, Firebase Cloud Messaging (FCM), and Azure Notification Hubs. Even though the app generates a device token and shows successful registration, the device isn't appearing in Azure Notification Hubs.
Verify FCM Key and Sender ID in Azure.

In Azure Portal, navigate to Notification Hub > Push Notification Services.

Confirm correct Firebase Server Key and Sender ID from your Firebase project.

Confirm that your app retrieves a valid FCM device token.

PushNotifications.addListener('registration', (token) => {
    console.log('Device Token:', token.value);
});

Verify the backend sends the device token to Azure Notification Hubs using the correct payload.

{
    "Platform": "gcm",
    "Handle": "<DEVICE_TOKEN>",
    "Tags": ["user:<USER_ID>"]
}

Check logs in Azure Monitor for registration errors.

Manually test device registration using Postman.

API POST https://<namespace>.servicebus.windows.net/<hub>/registrations?api-version=2015-01

Headers: Authorization: <SAS Token>

Content-Type: application/json

{
    "Platform": "gcm",
    "Handle": "<DEVICE_TOKEN>"
}

Check app permission in AndroidManifest.xml,

<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />

Verify the Firebase Server Key is valid.

Confirm FCM token validity.

Ensure the backend correctly forwards tokens to Azure.

Use the Test Send feature in Azure Notification Hub to send a notification.
https://learn.microsoft.com/en-us/azure/notification-hubs/notification-hubs-push-notification-overview
https://learn.microsoft.com/en-us/azure/notification-hubs/notification-hubs-android-push-notification-google-fcm-get-started
https://learn.microsoft.com/en-us/azure/notification-hubs/notification-hubs-push-notification-fixer
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