Using this link GCM/FCM notifications to FCM v1. I am trying to migrate from GCM/FCM notifications to FCM v1. From the guide, I - Configured the Firebase Service Account Credentials in Azure Notification Hub. Updated backend SDK C# code use FCM v1 platform during installation & registration of push notification. Verified that the device is actually registered in notification hub (by getting registrations from notification hub). Checked that Installation is now having the new Platform : FcmV1 instead of Gcm Verified that notification is delivered to app when sent from firebase console. The problem is: I am able to call SendFcmNativeNotificationAsync() and send a notification to the registered device. This is my template according to the migration documentation. "{ "message" : { "notification" : { "body" : "$(message)", "title" : "Test" }}}" and my call to templated notification is $NotificationOutcome = $client.SendTemplateNotificationAsync( $templateParameterDictionary, '$InstallationId:{61D21000-XXXX-}').Result But I am not able to call SendTemplateNotificationAsync() and send a notification to the registered device. When sending notification from "Test Send" in Azure Portal, it does not get delivered. When sending template notification from code (C# - Microsoft.Azure.NotificationHubs nuget), it shows same error.

PushNotifications: Upgrade to FCMv1 is not delivering Templated Notifications from Azure

Smitha Kalluparambil 5

Using this link GCM/FCM notifications to FCM v1. I am trying to migrate from GCM/FCM notifications to FCM v1.

From the guide, I -

Configured the Firebase Service Account Credentials in Azure Notification Hub.
Updated backend SDK C# code use FCM v1 platform during installation & registration of push notification.
Verified that the device is actually registered in notification hub (by getting registrations from notification hub).
Checked that Installation is now having the new Platform : FcmV1 instead of Gcm
Verified that notification is delivered to app when sent from firebase console.

The problem is:

I am able to call SendFcmNativeNotificationAsync() and send a notification to the registered device.
1. This is my template according to the migration documentation. "{ "message" : { "notification" : { "body" : "$(message)", "title" : "Test" }}}" and my call to templated notification is $NotificationOutcome = $client.SendTemplateNotificationAsync( $templateParameterDictionary, '$InstallationId:{61D21000-XXXX-}').Result
But I am not able to call SendTemplateNotificationAsync() and send a notification to the registered device.
When sending notification from "Test Send" in Azure Portal, it does not get delivered.
When sending template notification from code (C# - Microsoft.Azure.NotificationHubs nuget), it shows same error.

Andreas Leitel 30

We do have the same problem.

After updating to FCM v1 (at Server Plane), we are no longer able to send templated notifications using SendTemplateNotificationAsync.
As also described by @Smitha Kalluparambil we are still able to send notifications by using SendFcmV1NativeNotificationAsync(...) method (he mentioned: SendFcmNativeNotificationAsync)
The template structure has been updated to wrap the notification inside a "message".
Firebase Cloud Messaging API (V1) is enabled
FCM V1 Credentials are correctly set on NotificationHub (during migration it should support FCM & FCM V1). "Azure Test" notifications can be sent to device.
We are using the installation method:

Dictionary<string, InstallationTemplate> templates = new Dictionary<string, InstallationTemplate>();
Microsoft.Azure.NotificationHubs.Installation installation = new Microsoft.Azure.NotificationHubs.Installation()
{
  InstallationId = deviceRegistration.InstallationId,
  PushChannel = deviceRegistration.PushChannel,
  Platform = NotificationPlatform.FcmV1,
  Templates = templates,
  Tags = new List<string>()
          {
              $"env:dev",
              $"principal:C4E4CEB3-0E0D-446A-B5CF-73B2957745C0",
              $"version:V4"
          }
}; 
// add various templates
templates.Add("t-incident", new InstallationTemplate()
{
  Body = JsonConvert.SerializeObject(
        new
        {
          message = new
          {
            notification = new
            {
              title = "$(Title)",
              body = "$(Summary)",              
            },
            data = new
            {
              message = new
              {
                title = "$(Title)",
                summary = "$(Summary)",
                message = "$(Message)"
              }
            },
            content_available = true
          }                
        }
    )
});
// more templates
// ...
// add installation:
await Hub.CreateOrUpdateInstallationAsync(installation);

where the deviceRegistration object is provided by the client
where the templates dictionary is populated with multiple templates, each with keys such as "t-incident" or "t-status".
where the "Tags" property serves as the "installation-key" "by env, principal and an internal Version"

We then send the templated notification by providing the template properties and the tagExpression such as:

var tagExpression = "t-incident && env:dev && principal:C4E4CEB3-0E0D-446A-B5CF-73B2957745C0 && version:V4"
NotificationOutcome outCome = await Hub.SendTemplateNotificationAsync(parameters, tagExpression);

This did work with Microsoft.Azure.NotificationHubs v3.3.0 (FCM legacy)

Since we upgraded to FCM V1 (Microsoft.Azure.NotificationHubs v4.2.0), the above procedure does no longer work.

Any advice?

ajkuma 22,416 Reputation points Microsoft Employee

2024-04-23T09:10:42.5066667+00:00

@Smitha Kalluparambil , Andreas,

Based on my understanding, you are experiencing the issue that we’d addressed here, please check and let us know.

The error "The notification could not be delivered due to an unknown error" occurs.

The problem was resolved by enabling Firebase Messaging API on Google console.
Andreas Leitel 30 Reputation points

2024-04-23T13:47:16.8633333+00:00

@ajkuma

No. this is not the same problem (at least not for us).

We did enable Firebase Cloud Messaging API (V1) on Google Firebase console:

SendFcmV1NativeNotificationAsync works
SendTemplateNotificationAsync does NOT work

We could of course use SendFcmV1NativeNotificationAsync. But that prevents us from working with Installation templates
Smitha Kalluparambil 5 Reputation points

2024-04-24T13:02:13.7166667+00:00

@ajkuma Firebase Cloud Messaging is enabled on our end. This does not fix our issue.

As @Andreas Leitel said it is not the problem

The problem is

SendFcmV1NativeNotificationAsync works SendTemplateNotificationAsync does NOT work
ajkuma 22,416 Reputation points Microsoft Employee

2024-04-24T15:04:35.83+00:00

Andreas, Smitha , Thanks for confirmation and additional info.

Smitha Kalluparambil, While I'm discussing on this internally, will connect with you privately to get additional Info about your resources for a closer investigation.
Andreas Leitel 30 Reputation points

2024-04-24T17:09:03.4266667+00:00

@ajkuma
If required, we could support you as well via private messages. Let me know.
ajkuma 22,416 Reputation points Microsoft Employee

2024-04-25T10:26:13.5966667+00:00

Andreas, thank you for your help with this. On Q&A, we can only initiate a private message with question author/OP. I'll follow-up with you soon.
Luca Lusetti 5 Reputation points

2024-04-26T06:59:42.6566667+00:00

We faced the same proble, sending tests from the Azure Console are delivered but SendTemplateNotificationAsync does not reach the device. Is there any solution ?
ajkuma 22,416 Reputation points Microsoft Employee

2024-05-01T09:27:23.3966667+00:00

Our product engineering team is investigating this issue, as soon as I have more updates, I'll share it here. Thanks for your patience.