Please advice how can I audit all actions of specific user in SQL Server 2008 EE? If it can be traced and written to log file? If the audit has the levels?
If i understand correctly, you want to see all activity from a single user.
The quickest would be a profiler trace filtered to that user, start a trace and in the Event Selection and Column Filters add the user under "Like" in the LoginName filter, or NTUserName if appropriate.
Beware of overhead when using profiler in production it can be resource hungry.
If you want something more long term, you can look into auditing. Here is a useful tutorial for Select Statements but there is much more you can do with it.
As sqlblog of jonathan_kehayias Here you can trace like who and from what machine a server side trace was created.
First execute the this TSQL query.
select trace_event_id, name from sys.trace_events where name like '%trace%'; Go
The run the next TSQL query like
DECLARE @FileName VARCHAR(MAX) SELECT @FileName = SUBSTRING(path, 0, LEN(path)-CHARINDEX('\', REVERSE(path))+1) + '\Log.trc' FROM sys.traces WHERE is_default = 1; SELECT LoginName, HostName, ApplicationName, StartTime, TextData FROM sys.fn_trace_gettable( @FileName, DEFAULT ) AS gt WHERE EventClass = 175; Go