On each collector server and MoM (Manager of Managers) servers, the default logs directory is:
<em install root>/logs/
On each agent (typically JVMs being monitored by Introscope), the following file will control how the agents are configured.
/path/to/IntroscopeAgent.profile
In the IntroscopeAgent.profile file, there are two main agent log files, autoprobe.log and IntroscopeAgent.log.
introscope.autoprobe.logfile=/path/to/autoprobe.log
log4j.appender.logfile.File=/path/to/IntroscopeAgent.log