Is it possible to renew a cert on CA server?

Hi,

We used the same method in https://blogs.technet.microsoft.com/rmilne/2014/06/17/how-to-request-certificate-without-using-iis-or-exchange/ to request server authentication cert for our domain controllers.  Now, we need to renew these certs as they are going to expire in one month.  Just wonder is it possible to renew these certs from CA server instead of using certreq to generate request file again manually on each domain controller?

Thank you for your sharing and help!