[otrs] Escalation Notification

For a user, I want to enable Escalation notification in the User preferences. But I can find it there; I think it has to be get enabled from Sysconfig. Can anyone guide? No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.10.8/906 - Release Date: 7/17/2007 6:30 PM