The local computer name.
domain
If your windows XP Professional based PC is connected to a domain, you can not add a user to the domain. This must be done on the server, and added in the active directory. If you just want to add a user ( not on a domain ), then go to START - SETTINGS - CONTROL PANEL - USER ACCOUNTS
Windows 7 Professional, Enterprise, and Ultimate
Windows 7 Professional and Ultimate editions have a feature called Domain Join, which is designed to join a domain quickly and more securely.
ofcourse! use the windows 7 profesional. 'cause the words domain is only for the internet. Windows 7 Professional, Enterprise, and Ultimate
In AD (OS server 2000,2003 etc) the all the information is stored in NTDS.DIT database if the server is standalone and not connected to any domain then account information is stored in SAM.
HelpServicesGroup
Windows 7 Professional can be added to an Active Directory domain. the other versions has issue and many of the feature not available to run AD correctly
user account and a computer account
users global groups domain local groups
Windows Domain System or Windows Domain Service
Actually it's the Domain Controller