When you create an Apple Push Notification service (APNs) certificate for your app, it is created with a Bundle ID. This Bundle ID was automatically generated in Step 3 of creating an app build for the Apple App Store. Once your app has been approved by Apple, you cannot change your app's Bundle ID.
If you later want to update an existing APNs certificate, you will need to find the APNs certificate corresponding to your app’s Bundle ID and create a new APNs certificate with this same Bundle ID. You can find this Bundle ID on iTunes Connect.
NOTE: If you create a new APNs certificate with a Bundle ID that is different than the one you used to submit your app to the Apple App Store, you will NOT be able to upload the new app build to your app on iTunes connect. Make sure to use the Bundle ID associated with your app on iTunes connect. Do not use the Bundle ID which appears in Step 3 of creating an app build for the Apple App Store (since this Bundle ID changes with each new app build).
To Find Your App’s Bundle ID:
- Sign in to iTunes Connect.
- Click My Apps.
- Click on the app whose Bundle ID you want to find.
- Click More and then click About This App.
- Your Bundle ID is displayed and begins with mobapp.at