At a command line, change to the directory where the ics.conf is located:
cd /etc/opt/SUNWics5/config
Specify the transaction log name:
logfile.store.logname=storename.log
Specify the directory path for the transaction log directory:
The default value is: logfile.logdir="logs"
When you have completed editing the ics.conf file, restart Calendar Server:
cal-svr-base/SUNWics5/cal/sbin/start-cal