I mean no user interface!
When I login in the physical zentyal machine I don't find the zentyal OS, but as I mentioned before the "desktop lightweight environment";
I can't access the web interface (it's stuck "wait until zentyal is ready").
much clearer now. So nothing disappeared in fact but GUI is locked on "waiting" message.
BTW, so that you get better understanding, there is no "Zentyal OS".
Zentyal is an application on top of "Ubuntu server" OS (well when installed from packages because when installed from ISO, this server rather looks like a desktop
)
As suggested by peterpugh, look at /var/log/syslog, /var/log/zentyal/zentyal.log and /var/log/zentyal/error.log
I just wonder how you know that "
users are still there"
I've no doubt this is true but you can't really state it unless you already looked at LDAP content.
What's your Zentyal version ?