The user account is created on the Domain controller not on the client computer. So every user that wants to access a domain based computer must logon to the domain using a valid user account. When you start Window XP that has been configured to join a domain, a Log on to Windows dialog box appears. The user can use this dialog box to log on to the domain by .entering the domain name and password. Window log on by using local account he is not connected to a network domain.

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If the computer is not part of a domain, Windows XP can display a friendly logon screen that displays an icon for each of the computer local user. The user can log on simply by clicking the appropriate icon and entering a password. This feature is not available for computer that have not join the domain. Note that if user logon by using the local computer account rather then the domain account, can still access domain resources. A Connect To dialog box appears whenever the user attempt to access a domain recourses. Then a user can enter a domain user name and password to connect to domain.