Hi Mike,
You can get the authenticated user information in C# code or behind
For example,
1. in C# code
public User user = YOUR OWN METHOD TO GET AUTHENTICATED USER
2. in .aspx page
<script>
window.onload=function()
{
var input_name=document.getElementById("input_name");
//set the user name here
input_name.value='<%= user.UserName %>';
call_submit_form();
}
</script>
you can set the Email address by the same way.
Regards,
Jeff