If you have installed LiveCycle in a JBoss application server the server activity will normally be logged in:
If the JBoss log is no longer logging activity you should check the following:
The jboss-log4j.xml file is located in <JBOSS_HOME>\server\lc_turnkey\conf and controls logging in JBoss. If there is any problem with this file then logging may stop working. You can download this file (jboss-log4j-working) from a fresh LiveCycle installation on JBoss and replace the original (make a backup first). Restart JBoss after swapping the log4j file and logging should switch to the server1.log file.
2. User account
If you are starting JBoss using a Windows service ensure that the user account used for the service has administrative privileges. See the installation documentation for further requirements such as disabling UAC on Windows.