Article ID: 306925 - View products that this article applies to.
This article was previously published under Q306925
When you try to authorize a new Dynamic Host Configuration Protocol (DHCP) server, the new DHCP server may not be authorized. This behavior occurs on a network that has existing DHCP servers that are authorized in Active Directory.
Later, the new DHCP server may be authorized, but the existing DHCP servers may be unauthorized.
When you try to authorize the original DHCP servers again, you may receive one of the following error messages:
Error message 1
The specified servers are already present in the Directory Service
Error message 2
DHCP Server not authorized:
Event ID: 1051
The DHCP/BINL service has determined that it is not authorized to service clients on this network for the Windows domain: Your_Domain_Name.Domain_Root
This behavior may occur if the IP address of the original DHCP server has changed.
To resolve this behavior, turn on the Unauthorize option for the original DHCP server in Active Directory, and then authorize the DHCP server again. This action will assign the new IP address to the DHCP server. It will also permit DHCP to distribute leases.
To turn on the Unauthorize option for the original DHCP server in Active Directory and then to authorize the DHCP server again, follow these steps:
301423Warning If you use the ADSI Edit snap-in, and you incorrectly modify the attributes of Active Directory objects, you can cause serious problems. These problems may require you to reinstall Microsoft Windows 2000 Server, Microsoft Exchange 2000 Server, or both. Microsoft cannot guarantee that problems that occur if you incorrectly modify attributes of Active Directory objects can be solved. Modify these attributes at your own risk. To use ADSI Edit to authorize the DHCP servers, follow these steps:
(http://support.microsoft.com/kb/301423/ )How to install the Windows 2000 Support Tools to a Windows 2000 Server-based computer
Article ID: 306925 - Last Review: October 30, 2006 - Revision: 5.1
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