Know which leave counts toward FMLA

Q. I told an employee who takes lots of intermittent FMLA leave that all of her time out of the office (no matter what it was for) would count against her FMLA time. My VP called me in and told me I was wrong and that was absolutely NOT the law. What is the best way to track her intermittent leave? Do I ask for documentation each time? —J.S., Texas