On our network, the servers all run Windows 2003, except two that run Windows 2000. All domain controllers run 2003. We do not have an Exchange Server, users connect to a hosted mail server offsite. Our users do access network shares on the 2003 servers. The shares are mapped automatically at logon through a script. We have one domain, and use a 255.255.0.0 subnet mask. We don't have any remote offices, etc.. We have a WINS server, but is it really necessary in our environment?