You are the network administrator for The network consists of a single Activev Directory domain named The company's main office is in Tokyo, and it has a branch office in Osaka. Each office is configured as an Active Directory site. The two offices are connected by a 128-Kbps connection. All domain controllers run Windows Server 2003. All client computers run Windows XP Professional. All network administrators are located in Tokyo. Universal group membership caching is enabled. The server roles and IP addresses for each site are shown in the following table. The network connection between Tokyo and Osaka intermittently fails. Only the client computers in Tokyo have NetBIOS enabled. All client computers are configured to use DHCP. The significant DHCP scope options for Tokyo are shown in the following table. You create a user account for a new employee in Osaka. The user report that she cannot log on to the domain. You confirm that you can log on by using your account and then by using the user's account. You also confirm that all other users in Osaka can log on. You need to ensure that the user can authenticate to the domain. What should you do?（）