The Oracle ATG Web Commerce setup program adds a protocol.jar file to the lib subdirectory of the WebLogic domain directory you specified during the installation process.
Edit the setDomainEnv.sh|bat file in the <domain>/bin directory. For example:
set CLASSPATH=C:\WebLogic\user_projects\domains\mydomain\protocol.jar;
%WEBLOGIC_CLASSPATH%;%POINTBASE_CLASSPATH%;%JAVA_HOME%\jre\lib\rt.jar;
%WL_HOME%\server\lib\webservices.jar;%CLASSPATH%Note: The Configuration and Installation Manager (CIM) utility will make these configurations for you. See Configuration and Installation Manager (CIM).

