When you use Active Directory Users and Computers to view the properties for a domain user, the Dial-in tab does not appear. This issue occurs on your Microsoft Windows XP-based computer that has the Microsoft Windows Server 2003 Administration Tools installed. However, when you use a Terminal Services session to view the user properties on a Microsoft Windows Server 2003-based computer, the Dial-in tab appears.
To resolve this issue, install the Adminpak.msi file that was released with Windows Server 2003 Service Pack 1 (SP1). For more information on installing Adminpak.msi, visit the following Microsoft Web site: