title: Renewing Production Push SSL Certificate - Apple APNS
body: <p>Our production push ssl certificate is going to expire soon.  If I generate a new certificate, will the other certificate remain valid until it is set to expire (at which point it must be replaced with the new certificate)?  </p>
  
  <p>Will both certificates work at the same time?</p>
  
  <p>Just concerned about the timing.  For our app, we host a push server and so do a few of our customers.  I want to make sure creating a new certificate and updating our push server with the new certificate doesn't mess up our customers' push servers that will, for a time, still have the old certificate installed.</p>