Connection to APNS closed. Delivery error: INVALID_TOKEN
<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>