How to appear user of ldap on outlook address book?

==== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
======== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
======== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
======== Required information ====
- iRedMail version: v2.1.2
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Linux/BSD distribution name and version: CentOs 6.5
- Related log if you're reporting an issue:
====

Dear team,

I have question about sync address book from outlook with ldap configuration. I already success to create the account with ldap user, but the question is when i click the address book and choose my server as ldap address book the user wont appear until i search the user, can the users of ldap automatically appear when i click the address book from my server?

Regards,

Marcel