[kh99]

Originally Posted by d1jsp

I use the Username Regular Expression :
^[A-Z0-9]

I think the expression should be

^[A-Z0-9]+$

If you leave off the +$ then it's only saying that the name has to start with a letter or number. But you should be aware that if you use that expression, then names can only contain letters or numbers (and no other symbols), so you would need to add any other symbols you want to allow.

Of course, none of this will affect any existing names.