Netscape DIRECTORY SERVER 6.02 - ADMINISTRATOR Administrator's Manual page 73

For your changes to be taken into account, go to the Tasks tab, and select
5.
Restart the Directory Server.
NOTE For best performance, the attributes set for updating should also be
indexed. For information on indexing, see Chapter 8, "Managing
Indexes."
Maintaining Referential Integrity
Chapter 2 Creating Directory Entries 73