Crear Sub grupos

Buen dia, estoy probando el openfire la ultima version, todo perfecto pero, no puedo crear subgrupos, por ej: -INFORMATICA

                                                                                                                                                                                      ºJefe

                                                                                                                                                                                           -Soporte Tecnico

                                                                                                                                                                                                ºtecnico 1

                                                                                                                                                                                                ºtecnico 2

                                                                                                                                                                                            -Datos

                                                                                                                                                                                                 ºdatos 1

                                                                                                                                                                                                 ºdatos 2

Dentro del grupo de informatica esta el grupo de soporte tecnico y datos. Pero por ahora solo me deja crear grupos y no subgrupos. No se si falta una configuracion o un plugin . Gracias !!