When a client computer logs on to a domain that includes Microsoft Windows Server 2003-based domain controllers and Active Directory directory service sites, the client computer is authenticated by a remote domain controller instead of by the local domain controller. Additionally, you may receive an event that is similar to the following in the System event log of the local Windows Server 2003-based domain controller:
If you examine the Netlogon.log file on the Windows Server 2003-based domain controller, you may find text entries that are similar to the following in the Netlogon.log file:
07/22 10:02:32 netbios_Domain_Name : NO_CLIENT_SITE: Client_Name Client_IPaddress
07/22 10:02:32 netbios_Domain_Name : NO_CLIENT_SITE: Client_Name Client_IPaddress
07/22 10:03:07 netbios_Domain_Name : NO_CLIENT_SITE: Client_Name Client_IPaddress
Note netbios_Domain_Name is the NetBIOS name of the domain.
Client_Name is the name of the client computer.
Client_IPaddress is the IP address of the client computer.