You received an email from Apple related to "Your Apple Push Services Certificate will no longer be valid in 30 days". You need to rebuild your iOS/Apple push notification certificate to ensure that it will not expire in 30 days.
The Apple Support email you received contains - amongst others - the following information:
Your Apple Push Services Certificate will no longer be valid in 30 days. To generate a new certificate, sign in and visit Certificates, Identifiers & Profiles.
Certificate: Apple Push Services
To learn more about expired certificates, visit the certificates support page.
The Apple Push Services Certificate comes into play when sending push notification to mobile apps. The above message informs you that your certificate is due to expire in 30 days. An expired or invalid Certificate prevents push notification from going out.
- A published iOS application.
- Reseller Account
BiznessApps provide a tool that allows you to quickly rebuild the push notifications certificates on your own.
Please follow the steps outlined in the Rebuilding an iOS/Apple Push Notification Certificate.