Enabling LDAPS at installation time

To enable LDAPS at installation time, change the port used by the LDAP server in the installation menu from 389 to 636.

Enabling LDAPS after installation

Modify the URL used by LDAP on all servers, and make sure that ldap_starttls_supported is set to zero in the localconfig.

su - zimbra
zmlocalconfig -e ldap_master_url=ldaps://mymaster.somewhere.com:636
zmlocalconfig -e ldap_url=ldaps://myreplica.somewhere.com:636
zmlocalconfig -e ldap_starttls_supported=0
zmlocalconfig -e ldap_port=636
zmcontrol stop
zmcontrol start