Sametime offline chat and other server examples
Sametime out of the box requires chat partners to be online to chat. Other than some of the public IM products you can't "leave a message". If you are interested in this functionality you have to roll your own. To do that you require the Sametime Community Server Toolkit and working knowledge of Java. A good starter is the Redbook Working with the Sametime Community Server Toolkit which is valid since Sametime 3. Also a good read is the IBM Lotus Sametime Community Server Toolkit Tutorial that includes the skeleton code for the offline service. All the Sametime specific parts are covered, you just need to add persistence if needed.