We have the new cert installed on our server however when we try to connect using: ~$ openssl s_client -showcerts -connect api.sandbox.push.apple.com:443 We get the following CONNECTED(00000003) depth=1 CN = Apple Public Server RSA CA 12 - G1, O = Apple Inc., ST = California, C = US verify error:num=20:unable to get local issuer certificate verify return:0 Certificate chain 0 s:/CN=api.development.push.apple.com/OU=management:idms.group.533599/O=Apple Inc./ST=California/C=US i:/CN=Apple Public Server RSA CA 12 - G1/O=Apple Inc./ST=California/C=US----BEGIN CERTIFICATE ......... This line: unable to get local issuer certificate is what concerns me.. What are we doing wrong here?

Also this line concerns me more and may have more clues as to the problem: @@ X ���HTTP/2 client preface string missing or corrupt. Hex dump for received bytes: 0aread:errno=0 Can anyone help direct me on this matter? I'm an iOS dev so I'm not used to handling these types of issues.