To improve performance when Calendar Server accesses the LDAP directory server, add indexes to the LDAP configuration file for the following attributes.
This attribute is used to search for the default calendar for a calendar user or resource. Specify presence (pres), equality (eq), and substring (sub) index types.
This attribute is used to search for other calendars owned by the user. Specify presence (pres), equality (eq), and substring (sub) index types. See also 21.2 Improving Calendar Search Performance in a DWP Environment.
These attributes specify a user’s primary and alternate email addresses. See also 14.1 Creating Calendar User LDAP Entries and 126.96.36.199 To Add Calendar Service with Calendar Server Utilities.
For information about adding directory server indexes, refer to Directory Server documentation found at: