Logging and Tracing 
Logging and Trace Files
The following files are available for logging important security events and helping administrators with troubleshooting:
· Security log
Location in Log Viewer: ./log/system/security.<n>.log
Location in file system: <drive>:\usr\sap\<SID>\<instance_number>\j2ee\cluster\server<n>\log\system\security.<n>.log
● Security audit log
The security audit log is part of the security log. The category System/Security/Audit in the log entries of the security log.
For more
information, see 
Security Audit Log of
the AS Java.
● Trace files
Location in Log Viewer: ./log/defaultTrace.<n>.trc
Location in file system: <drive>:\usr\sap\<SID>\<instance_number>\j2ee\cluster\server<n>\log\defaultTrace.<n>.trc
This file contains all the trace information for the whole server and includes trace information for user management engine (UME) libraries and the UME provider (com.sap.security.core.ume.service). The information in this file is on a fine-granular level and includes exceptions, warnings, and debugging information. It is mainly required by the SAP support team.
● Directory server logs
When you use an LDAP directory server as a data source for the UME, you can configure log files to monitor and troubleshoot the connections.
For more information, see the following:
¡ Directory Server Connection Pool Log
Viewing Logging and Trace Files in the Log Viewer
...
1. In the Visual Administrator, on the Cluster tab, choose <system_id> ® Server ® Services ® LogViewer.
2. Make sure the Runtime tab is displayed.
3. In the navigation tree, choose Cluster ® Server ® <ASJava_installation_directory> and navigate to the required file.
Configuring the Log Viewer
You can change the severity level of logging and tracing using the log configuration services in the visual administrator.
...
1. In the visual administrator, on the Cluster tab, choose <system_id> ® Server ® Services ® Log Configurator.
2. Choose the configuration you want to change.
¡ For security logging, choose Categories ® Root Category ® System ® Security ® Audit.
¡ For tracing, switch to advanced mode and choose Locations ® Root location ® com ® sap ® security.
3. Change the severity level as required.
a. Select the required package and choose Edit.
b. Under Severity change the severity settings.
The new severity level is activated immediately. You do not need to restart the server.