Which service must be restarted after modifying the Java Keystore on the CVP servers?

The service that must be restarted after modifying the Java Keystore on the CVP servers is the Cisco CVP WebServicesManager. The Cisco CVP WebServicesManager is a service that provides web services for the CVP components, such as the Operations Console, the Reporting Server, and the Call Server. The Java Keystore is a file that stores the certificates and keys for secure communication between the CVP components and other systems. If the Java Keystore is modified, the Cisco CVP WebServicesManager service must be restarted to apply the changes and ensure the proper functioning of the web services12.

References:

Configure Secure Java Management Extensions (JMX) Communication on CVP3

User Guide for Cisco Unified CVP VXML Server and Cisco Unified Call Studio Release 11.5 (1) - Rest_Client Integration2