InfoPath Dev

I'm not sure what causes this...but I've seen InfoPath return the full domain\username  in the past with the username() function.   now, more commonly, I only see it return the user name.

Is this a switch type setting, or something upstream of InfoPath that has to be adjusted?

 thanks 

 I think if you publish the form and then open up the form, the domain name comes in as well.You might get other characters as well depending on your SP version and if you're using the getuserprofile service.

 I should note that the behavior of our 2010 and 2013 SharePoint servers is different.

InfoPath forms on the 2013 box do respond with the full domain / account name

 Forms on the 2010 box only return the account name.

and for further consideration, it appears the 2010 box will take a userprofile request without a domain name  on it, while the 2013 will not.  it's almost like there's a "treat as default domain" type switch for the service...but I don't think I've ever seen that anywhere in Central Admin

 means we're going to have to inspect a ton of forms when we move our db over.