iphone app: how to renew an expired distribution certificate through the iOS provisioning portal

My distribution certificate is tied to an app, that I have distri开发者_C百科buted ad hoc to number of field employees, and it says it's going to expire tomorrow. When I go into the iOS provisioning portal, I go to the certificates link, and then the Distribution tab. Under expiration date for the certificate the date is listed as tomorrow. My question is how do I renew the certificate? I've been told there may be a renew button that pops up when it expires. I've also been told this renew button is going to pop up today when it hasn't. Is there going to be a renew button? Will the renew button pop up under the provisioning profile attached to the certificate or in certificates-->distribution in the portal? None of this is documented anywhere on what I need to do to ensure no down time with my app.

Thanks for the help!

Once expired, you will get a renew button, yes. If you want to do it before it expires, revoke the current certificate and you will get a button to request a new one.

Which ever way you do it, your ad hoc app will stop working tomorrow and you should distribute a new build with new provisioning profile signed with new certificate.

From the apple developer support center certificates section:

iOS Distribution Certificate (In-house, Internal Use Apps)

Users will no longer be able to run apps that have been signed with this certificate. You must distribute a new version of your app that is signed with a new certificate.