Zentyal + FritzBox => How to configure?

[Hippo]

Hi everyone,
I'm very new to Zentyal. I installed the latest version of zentyal in order to realise a small active directory in my home office.
The problem is, that there's a FritzBox! 6490, which is responsable for managing the DNS, DHCP and internet access.
When I try to join the domain with a client, no domain controller is found, so the client cannot join the domain.

Can somebody explain how to configure zentyal AND the fritzbox in order to realise ONLY an active directory?

[julio]

Hi Hippo,

1. change FritzBox DHCP-Server/Local DNS-Server address to Zentyal IP address.
2. change/add to Zentyal DNS forwarder the FritzBox IP address