A new 12.5(1a) base installer is available for customers, which has OpenJDK JRE as the supporting Java run time for all the
CCE applications. Its predecessor the 12.5(1) installer employs Oracle JRE. Any installation done using the 12.5(1) installer
can continue to use Oracle JRE, and can receive Java security updates and fixes from the Oracle website.
However, if there is a need to apply an ES on 12.5(1) that mandates the installation of ES55 (mandatory OpenJDK ES), then
the Java updates would have to be downloaded and installed from the OpenLogic website.
CCE VMs installed using the 12.5(1a) installer would need the OpenJDK patches applied. You can verify the base installer version
to be 12.5(1a) from Control Panel > Programs > Programs and Features > Cisco Unified ICM/CCE 12.5.1a.