Extended Notification is used to inform recipients by e-mail that a workflow work item is waiting to be processed.

This e-mail notification makes sense if the recipient does not have a UWL in the portal (for example, this can be the case for the portal role Employee) or if the recipient does not frequently check his or her R/3 inbox. The work item does not appear in the UWL, but arrives in an e-mail as a link instead. This ensures that agents involved in a workflow process receive notification of a work item to be executed as soon as possible, meaning that the process can be completed without unnecessary delays. A link is provided in the e-mail body from which you can generate the work item to be executed. Alternatively, you can choose not to send the e-mail so that the recipient instead receives the work item in the worklist.

For more information, see Customizing for Personnel Management under  HR Administrative Services Configuration of Forms/Processes Process Configuration Enhanced Messages Enhanced Notifications of SAP Business Workflow .