oh sorry i think you mean the zentyal version.
my devices are ipad mini with newest orginal ios and android 4.4.4 with newest orginal firmware .. it is a google nexus5 from lg.
these two devices make same errors ...
[update] ohw and i see the sogo webaccess go to sbs.toplvldomain.local but the right url is mail.toplvldomain.com ... the Authority Certificate run over toplvldomain.com ... but i think thats not the problem because i write the ip address in my mobile devices for local test.
if i start test on my mobil device.. its say with correct user and passwort "no connectio to server" but if i write wrong user or pass say mobil device "Wrong username or passwort" O,o
i hope everbody can help me :/ because i want activsyn ^^ thx 4 answer