Hi florian,
yes - I have been through the faq, however I did review the cofiguration files again. Everything seems consistent with what is required. I just logged into sac, seelected a user and "advanced" tab - I then ran the index process by selecting "Reindex". This immediately gave results with the search function now working. It is starange as I have also run the command line index process several times.
The mobile client is still regstering "Invalid Username or Password" for a user/pass that functions correclty in the web client. Both log files "scalix-mobile.log" and "scalix-api.log" are empty.