Today our DNS service shut down by itself. The event log displays the following in this order: Information: The DNS server has started. Warning: The DNS server is waiting for Active Directory Domain Services (AD DS) to signal that the initial synchronization of the directory has been completed. The DNS server service cannot start until the initial synchronization is complete because critical DNS data might not yet be replicated onto this domain controller. If events in the AD DS event log indicate that there is a problem with DNS name resolution, consider adding the IP address of another DNS server for this domain to the DNS server list in the Internet Protocol properties of this computer. This event will be logged every two minutes until AD DS has signaled that the initial synchronization has successfully completed. 1: Information: The DNS Server has shutdown Any ideas?

These ones may help. Troubleshoot AD DS and restart the DNS Server service http://technet.microsoft.com/en-us/library/dd393047(WS.10).aspx Troubleshooting Active Directory http://technet.microsoft.com/en-us/library/cc737561(WS.10).aspx Regards, Dave Patrick .... Microsoft Certified Professional Microsoft MVP [Windows]