Yes, I replaced in the file mssql-ds in JNDI name MSSQLDS by DefaultDS and jdbc.microsoft.sqlserver by jdbc.sqlserver.microsoft. LiveCycle didn't connect to sql server with the user I created so I put the authentification of the database server in mixte mode even if it is recommanded to be in windows authentification.
OK - this might also do the trick for me. But how did you setup your user and password to conform to the windows authentication?
I have a domain user which has access to the db (my user is: myDomain\myUser). So I wonder how I make LC connect to the database with this user. How should the connection url and user/password look like?