WebSphere Extended Deployment provides jython script that you can use to add all custom properties required by grid execution environment (GEE) to all Compute Grid endpoints.
wsadmin -lang jython -f addCustomProperty.py <option>
You might have to modify the wsadmin command to wsadmin.sh or wsadmin.bat, depending on your operating system environment.
wsadmin -lang jython -f addCustomProperty.py --help
wsadmin -lang jython -f addCustomProperty.py --listEndpointsFor example:
>> wsadmin -lang jython -f addCustomProperty.py --list INFO: Grid Execution Environment was found on following targets: cell=myCell,cluster=Endpoint1 cell=myCell,cluster=Endpoint2 cell=myCell,node=myNode01,server=server1
wsadmin -lang jython -f addCustomProperty.py <target>