Hi,
1) Install DP 8.11 patch
2) Find in /etc/opt/omni/client/components/webservice.properties the keystore password
3) Run:
perl omnigencert.pl -server_id <FQDN of your server> -user_id hpdp -store_password <Your keystore password> -cert_expire <10 * 365>
4) omnisv stop
5) omnisv start