When you run Calendar with useFNS set on, Calendar will automatically attempt to register your calendar into the name space. Once it has been registered, someone can use just your username to browse your calendar. If you subsequently move your calendar, change the User Calendar Location in theDisplay Settings dialog box and the registered calendar address in the name space will automatically be updated the next time you restart Calendar. You can also update the information in the name space outside Calendar using the FNS command, fnbind.
In an NIS environment, auto-registration is not supported because NIS does not support dynamic updates of arbitrary data. In addition, fnbind only succeeds when run by root on the NIS master.