I am looking at applying Service Pack 23 here real soon. Our setup is as follows. We have a single AS.400 partitioned so thar PD is on one side(JDEPROD) and PY and DV on the other (JDETEST). WebSphere is running on JDEPROD side. I think I can handle the part of installing the service pack to the deployment server, then to the enterprise server(as/400), and then promoting it up through DV, PY, and lastly to PD, but when do I apply the service pack to the JAS Server?