[xwiki-users] LDAP user import vs registering new user

Hi, I'm testing the ldap features of xwiki and have a question regarding importing /registering new user. I managed to setup ldap authentication with user import and group mapping. The question is connected with this configuration flag: #-# Specifies the LDAP attribute containing the identifier to be used as the XWiki name (default=cn) xwiki.authentication.ldap.UID_attr=mail What I would achieve is a user authentication with his mail/password ( which is pretty common nowadays ). It works with ldap and after a successful authentication with i.e. mail = bruno(a)7cogs.com, a new user is created with the following value: username = bruno@7cogscom I assume that the 'dot' is not allowed to be used in the username string ? In my scenario there will be also a need for registering new users in a traditional (xwiki ) way but it seems to be impossible to provide a mail as a username ( even though the client side validation seems to not complain about that initially ): Invalid username provided. Please use only letters from the latin alphabet, numbers, and the underscore character. Do you have any clues how to achieve that ? maybe it's possible to set a flag in xwiki config similar to the ldap solution ( identifier to be used as the XWiki name ).. Thanks in advance, Piotr