I have OpenClinica 3.2 up and running and have integrated AD. I can see the users in the openclinica group when I go to add a user. However, all of the users have usernames in the format of firstname.lastname and the form errors with "The input you provided is not a valid user name in at least 5 alphanumeric or underscore characters format". Is there any simple way to allow the "." character, or can I modify the form validator class to allow it without any negative side effects?