[ovirt-users]ovirt-web-ui search active directory user problem

Ovirt version 4.3, active directory windows 2012r2; after adding domain authentication through ovirt engine extension AAA LDAP setup, when adding domain users through management interface configuration - > system permissions, select Search: domain, namespace: *. The following go button is gray and cannot be searched. It is normal to search through ovirt engine extensions tool test. How can I solve this problem?