We got the reminder from Pushwoosh indicating that the certificate(Apple Push) we have on file is about to expire. Do you have any documentation related to this scenario?
The most convenient way is to use our Autoconfiguration tool.
Simply choose the Autoconfiguration option in iOS configuration, fill in the required fields, and you're good to go.
You don't have to rebuild or update the application.
Please note that any existing APNs certificates for this Apple App ID will be revoked during Autoconfiguration!
As for the manual configuration, please refer to the following guide: