Are you able to add an account from the commandline as the zimbra user, using the "zmprov ca" command?
It's complaining that objectClass #4 is not valid during your user creation (they are 0 based in the numbering, so that's why value#3 is objectClass #4 ).
I note that my object's only have 3 objectClasses, so I wonder if the samba stuff got triggered somehow.
Sr. Member of Technical Staff
A Division of VMware, Inc.
Zimbra :: the leader in open source messaging and collaboration