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.
Add the parameter that follows to the ics.conf file to disable csstored from running:
Save the file as ics.conf.
Restart Calendar Server.
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.
Be sure not to disable csstored on machines where you have csstored configured for automatic backups.