The Server Message Block (SMB) protocol version used for file-sharing operation is determined during the negotiation process. It depends on the highest version supported by both the clients and the se...The Server Message Block (SMB) protocol version used for file-sharing operation is determined during the negotiation process. It depends on the highest version supported by both the clients and the servers. This table describes the protocol used with the default server/client configuration: Note: For more information, refer the Microsoft documentation on the support of the SMB 2 protocol on various Windows Operating System versions.