There are two rack rail kits for the SPARC T5-8 server. If you have installed the server with the old rack rail kit (P.N. 350-1662-02) without the shipping braces, you cannot ship the server while it is in the rack. If you installed the server with the new rack rail kit (P.N. 7069640) with the shipping braces, there is no restriction on shipping the server inside the rack.