Azure Notification Hub registrations disappear when sending a notification

Question

Recently our Azure Notification Hub became a very mysterious entity. When Apple devices register we can see them in Service Bus Explorer and as soon as we try sending any no

Answer 1

We had this exact error, but it turned out we were accidently using a "distribution" provisioning profile with a "development"/ sandbox push notification certificate. After switching to a development provisioning profile, push notifications worked!

Answer 2

Turns out the front end guys were unsubscribing too eagerly. Removing the unsubscribe code sorted out the issue. Also there was a problem with the APNS certificate, in order to run the front end app in debug it requires a sandbox certificate, not a production one, for the messages to be delivered properly.

Answer 3

Notification hub cleans up registrations with invalid tokens during the send flow. Looks like for some reasons APNS rejects your tokens and NH just removes registrations. Make sure:

1. you are getting token from physical device (not emulator);
2. APNS certificate uploaded to NH is not expired;
3. APNS certificate uploaded to NH corresponds APNS endpoint you are using in application (sandbox or production).