Hi
It all depends on your needs. For example 2003 server has some new features such as schema redefinition,
and aplication directory partitions. It also provides more security and reduces the cost of ownership by allowing
automated and centralized system maintenance. Other advantage will be the scaliblity and administration of the servers.
You can check this link for more information:
http://technet.microsoft.com/en-us/windowsserver/bb429518.aspx
HTH
Regards,
Teresa.
Regards,
Tere.
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