Indexes are not replicated automatically from one server instance to another. To index an attribute for all server instances holding a replicated suffix, perform one of the following actions.
Manage all server instances holding the replicated suffix as a server group in DSCC. Add the index to one server in the group, then use the Copy Server Configuration action to copy index settings to other servers in the group.
For more information about DSCC, see Directory Service Control Center Interface.
Manage the index on each server instance with the dsconf command, as described in Chapter 13, Directory Server Indexing.
Use binary copy to initialize suffixes, as described in Initializing a Replicated Suffix by Using Binary Copy.