HI, Does any body see this error before ? We tried to replicate between two wins server on different subnet ( thru. router. and we know that router does not handle broadcast traffics). We 're trying to find out how Netlogon can synchozine . w/o using broadcast traffic . any idea , appricated. thx below is the Error message for DHCP & WINS server in event viewer. Windows Operating System 5719 NETLOGON 5.0 NELOG_NetlogonAuthNoDomainController This computer was not able to set up a secure session with a domain controller in domain %1 due to the following: %2 This may lead to authentication problems. Make sure that this computer is connected to the network. If the problem persists, please contact your domain administrator. ADDITIONAL INFO If this computer is a domain controller for the specified domain, it sets up the secure session to the primary domain controller emulator in the specified domain. Otherwise, this computer sets up the secure session to any domain controller in the specified domain. Explanation The computer could not connect to the domain controller. User Action Do one or all of the following: • Review the Windows error code in the original message. This information might help you determine what caused the problem. • Verify that general network connectivity is available. For instance, check file shares, network printers, or availability of the Internet to verify that your computer has network connectivity. Currently there are no Microsoft Knowledge Base articles available for this specific error or event message. For information about other support options you can use to find answers online, see http://support.microsoft.com/default.aspx.