If you are hiring her from the agency then the agency should or will take care of procedures.. Even if she is on a probationary period a NOC from the previous sponsor is still required.. If her visa, I mean RP is not yet stamped on her passport then she could just exit and re-enter on your visa in this case no NOC will be required.. Hope this helps.. As i said earlier if you are recuriting her from an agency in Qatar then they will process everything for you..