Autocomplete users OC federation share

Hi, i have OC installed since several years; now is at version and since two days me and two collegues from far office (which have like me OC installed) decide to start sharing federation. We have succesfuly enabled federation and initiated trusted servers through admin page and exchanged some files between us in form . So far so good but my question is: how we can list autocompletion of users from sharing users like we are used on normal sharing internaly? Thanks in advance on helping me.