Log in as an administrator with permission to change the configuration.
Change to the /etc/opt/SUNWics5/cal/config directory.
Save your old ics.conf file by copying and renaming it.
Edit the ics.conf parameter that follows to specify the administrator’s email address:
Save the file as ics.conf.
Restart Calendar Server.
The calendar services do not need to be stopped to edit the ics.conf file, but you must restart the services in order for the changes to take effect.