I finally got the time to test this. I can confirm its working great BUT all the subsequent added users still have the bug after the ebox-filesharing is enabled and those created before all work great.
The problem is you can't add users after the setup is complete they will not work in the slave.
A really nasty bug has occurred
Exception
Unknown error at EBox::SambaLdapUser::_getAccountFlags Referral received
Trace
Unknown error at EBox::SambaLdapUser::_getAccountFlags Referral received at /usr/share/perl5/EBox/Ldap.pm line 712
EBox::Ldap::_errorOnLdap('Net::LDAP::Search=HASH(0xb58d46c)', 'HASH(0xb51f324)') called at /usr/share/perl5/EBox/Ldap.pm line 351
EBox::Ldap::search('EBox::Ldap=HASH(0xb2a206c)', 'HASH(0xb51f324)') called at /usr/share/perl5/EBox/SambaLdapUser.pm line 848
EBox::SambaLdapUser::_getAccountFlags('EBox::SambaLdapUser=HASH(0xb58d7cc)', 'wham2') called at /usr/share/perl5/EBox/SambaLdapUser.pm line 858
EBox::SambaLdapUser::_userSharing('EBox::SambaLdapUser=HASH(0xb58d7cc)', 'wham2') called at /usr/share/perl5/EBox/SambaLdapUser.pm line 459
EBox::SambaLdapUser::_userAddOns('EBox::SambaLdapUser=HASH(0xb58d7cc)', 'wham2') called at /usr/share/perl5/EBox/UsersAndGroups.pm line 2142
EBox::UsersAndGroups::allUserAddOns('EBox::UsersAndGroups=HASH(0xab05a88)', 'wham2') called at /usr/share/perl5/EBox/CGI/UsersAndGroups/User.pm line 50
EBox::CGI::UsersAndGroups::User::_process('EBox::CGI::UsersAndGroups::User=HASH(0xb4b4c5c)') called at /usr/share/perl5/EBox/CGI/Base.pm line 262
EBox::CGI::Base::run('EBox::CGI::UsersAndGroups::User=HASH(0xb4b4c5c)') called at /usr/share/perl5/EBox/CGI/Run.pm line 120
EBox::CGI::Run::run('EBox::CGI::Run', 'UsersAndGroups/User', 'EBox') called at /usr/share/ebox/cgi/ebox.cgi line 19
ModPerl::ROOT::ModPerl::Registry::usr_share_ebox_cgi_ebox_2ecgi::handler('Apache2::RequestRec=SCALAR(0xb58e198)') called at /usr/lib/perl5/ModPerl/RegistryCooker.pm line 204
eval {...} called at /usr/lib/perl5/ModPerl/RegistryCooker.pm line 204
ModPerl::RegistryCooker::run('ModPerl::Registry=HASH(0x980809c)') called at /usr/lib/perl5/ModPerl/RegistryCooker.pm line 170
ModPerl::RegistryCooker::default_handler('ModPerl::Registry=HASH(0x980809c)') called at /usr/lib/perl5/ModPerl/Registry.pm line 31
ModPerl::Registry::handler('ModPerl::Registry', 'Apache2::RequestRec=SCALAR(0xb58e198)') called at -e line 0
eval {...} called at -e line 0
I can reproduce this problem 100% of the time.