Username with dot "." > problems in Zarafa

[olix]

Hello,
I tested the latest version of Zentyal 3.2 and I have a problem with Zarafa
I created users with the following format > Firstname.Name
This is a problem for Zarafa because he does not want to recognize users with a dot "." > login Failed
In version 3.0 of Zentyal it worked perfectly. Someone have a solution?
LDAP problem no doubt.
I would also like to try to force the Zarafa login on the mail address > any help for that?
This could troubleshoot my situation.

Thanks