Currently, our company server is using the push service by calling APNS through the p8 certificate. In this process, our server does not have a CA certificate or SSL certificate in use. Only the p8 certificate is installed and only performs the role of calling APNS. If it is used like this, is there no need to update the CA certificate separately? Or do I have to apply a new SSL certificate and add the CA to it? Can someone help me plz?

I downloaded the .crt file to take the following steps. Could you please give me a guide on how to actually apply the file to the server? Upload only files to a specific path on the Linux server. keytool -import -alias cacert -file ca.crt -keystore client.truststore.jks Is it possible to just apply it with the above command? Please confirm. thank you