Acessar o link:

http://otrs.ifce.edu.br/otrs/index.pl?Action=AdminSysConfig;Subaction=Edit;SysConfigSubGroup=Frontend%3A%3AAgent%3A%3ATicket%3A%3AViewOwner;SysConfigGroup=Ticket

Em: Ticket::Frontend::AgentTicketOwner###Body

Definir o texto no campo ao lado.