External Access to Carbonio LDAP

Hi,

I used to use Zimbra and upgraded it to 9 a while ago. Last system update broke it beyond repair and I'm trying to move to CarbonioCE.
My problem is, that I used to use Zimbra LDAP to authenticate a bunch of services. Now I don't seem to have access to LDAP outside CarbonioCE server. Firewalls are clean (for internal network), but still I can't connect. ldapsearch works fine in CarbonioCE server.

I have script that restores user accounts and messages from daily backup (from Zimbra to Carbonio), so I'm fine with that, but my other services with LDAP -users doesn't work. 🙁