/*
Client callable script include used for filtering sys_user lists
to identify duplication email users
name: duplicateEmail
active: true
client callabe: true
*/
function duplicateEmail() {
    var xx = new GlideAggregate('sys_user');
    xx.addAggregate('COUNT', 'email');
    xx.addHaving('COUNT', 'email', '>', '1');
    xx.query();
    var answer = new Array();
    while (xx.next()) {
        answer.push(xx.getValue('email'));
    }
    return answer;
}