My ssl certificate dns expired on an OES 2015 server.
I tried to renew in imanager / netiq certificate server / repair default certificates.
I choosed a server name, and clicked on next (all default certificates will be overwritten) and it says the result: ssl certificate dns

... and nothing happens.
If I check the cert, it did not changed at all, the expiration date is the same as earlier.

What to do?