To be honest I dont understand the Zentyal message.
Samba4 directory replication in a domain works 100%.
Again I only know this because of some tests with VM's
http://sourceforge.net/projects/samba4all/I am just testing some problems with ldbmodify and ubuntu14.04 as I think its ubuntu as both the sernet binaries and zentyal have the same errors.
Strangely ldbedit works great and it a super tool for editing the ldap.
I really don't understand the Zentyal error as with my project I have installed the zarafa schema's.
I have set up a PDC and ADC and if you add a user on either DC the user is replicated.
Also I only needed to setup the zarafa schema once on one dc and any entries are also replicated.
So exactly why we are getting that message has me confused as it shouldn't really matter and already work?!