The Enhanced Security Server Redirection PDU is sent by the server to the client to instruct it to reconnect to an existing session on another server. The information required to perform the reconnection is contained in an embedded Server Redirection Packet (section 2.2.13.1). This PDU MUST NOT be sent if Standard RDP Security (see section 5.3) is in effect. The Standard Security Server Redirection PDU (see section 2.2.13.2.1) MUST be used instead.