No, never jump or fast rope in those, you'll break legs, hip or back.
I had Corcoran boots and was in 101st Airborne Division and we did not ever jump in those. They have no give to them. One guy in my battalion jumped in they and broke three vertebrae. Those are dress boots for inspections, dog and pony shows, and special events of parade and manual of arms or D and C. I jumped in jungle boots that I had taped, internally, duct tape ankle support.