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 one or more of the parameters as shown in The following table:
Maximum number of authenticated user ID's (uids) and passwords that Calendar Server will maintain in the cache. The default is “10000”.
Number of seconds since the last access before a uid and password are removed from the cache. The default is “900”.
Save the file as ics.conf.
Restart Calendar Server.