Use these guidelines to determine if your site should configure the LDAP data cache:
You don’t need to configure the LDAP data cache if your Calendar Server accesses the master (or root) LDAP directory directly with no delays in the availability of committed LDAP data.
If your site has deployed a Using the LDAP Data Cache in a Master/Slave LDAP Configuration where Calendar Server accesses the master LDAP directory through a slave LDAP directory server, which in turn introduces a delay in the availability of committed LDAP data, configure the LDAP data cache to ensure that your end users have the most recent data.