Need to re install Oracle client on the enforce server due to OCI errros while upgrading.
Error calling OCIServerAttach for database <//IPADDRESS:PORT/ServiceName>: ORA-12514: TNS:could not resolve the connect identifier specified.
Oracle client needs to be reinstalled with Administartor feature.
> Ran universal installer and initiated remove components for 12c client
> Ran deinstall.bat from oracle client product folder (ORACLE_HOME) and then deleted the oracle folder.
> Rebooted the enforce server