varamthanapon, Do what Jason suggested. Once you have JBCS installed on Windows, you can copy the mail.ear and calendar.ear directories and the jbms-ds.xml (data source) file to your JBoss deploy directory. We're not using Solaris, but this is what I did to get JBCS on our Linux servers. As far as separating them, I'd say it depends on what you are doing. If you have app running on JBoss already or plan to, using JBAS is a simple way of doing it. We're using JBCS on JBAS since it's part of our app. If you want more control to bring down JBCS separate from your other apps, you may want to run them separate if you have the memory. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3956985#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...