I've a DR form where I want the unique userid to be the registrant's email address.
I've checked the box in Module Configuration to: "Same email cannot register twice."
If I register "somename@somedomain.com" first
Then register "somename@somedomain.com" there is no warning or any indication that there is a problem. However, the username becomes "somename@somedomain.com1"
I'd prefer to have the registration stop until it is resolved, rather than add a digit to the username. Is this a setting that I'm missing somewhere?