Hello,
I difficult problem and I'm not sure what it is is or where it is.
I have a form that receives data from external database. Generally it works fine but some for some users the data isn't retrieved. By testing I can eliminate problems related to different InfoPath versions, how the users open the form or in which country user is located. So what could possibly be the reason? I think it cannot be related to user groups in database because user is not accessing the database, the form is.
I have "Allow users to fill out this form if data is unavailable" unticked