Truly a question for her high school counselor's office that handles these issues. Are you posting here out of concern that she'll get in trouble if she asks about it at school?
Details are available on the FCPS web site. Did you check it first?
http://www.fcps.edu/is/schoolcounseling/documents/ExpungingGradesinMS.pdf
Sorry, but I'm not sure why parents post asking questions before checking the resources and asking the experts. This one is easily answered with some research and others' anecdotal experiences really don't matter -- the rules do.
I would have your daughter do this research for herself. I would also have her ask a counselor your question about whether and how colleges take note of this.