I am currently at a client whose Domain Functional Level is 2000 Mixed and Forest Functional Level is Windows 2000. There are no Windows 2000 servers in this domain, there is only one site, one forest, one domain. I want to raise it to at least Windows 2003 forest and domain level. On reading I found that I first need to raise the domain to Windows 2000 native before doing anything with Windows 2003, is this correct? If so in what order should I be raising the domain and forest functional levels?