title: Connection to APNS closed. Delivery error: INVALID_TOKEN
body: <p><a href="https://stackoverflow.com/questions/40099612/updating-expired-p12-certificate-in-mobilefirst">After updating .p12 file and deployed .wlapp on mobilefirst server</a>, push notification has stopped working and getting following error:</p>
  
  <blockquote>
    <p>Connection to APNS closed. Delivery error: INVALID_TOKEN, error code: 8, identifier: 1.<br>
    [ERROR   ] FPWSE1083E: Failed to send APNS notification with identifier 1, device token.</p>
  </blockquote>
  
  <p>please advice, what we are doing wrong. is this related to .p12 file or do we need to send our application to apple store? </p>
  
  <p>Secondly we notice that after updating .p12 file client gets the direct update ,so is this normal behavior?</p>