Microsoft KB Archive/196266

= DHCP Service Does Not Update When Upgrading SBS to Full Windows NT =

Article ID: 196266

Article Last Modified on 2/24/2004

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APPLIES TO


 * Microsoft BackOffice Small Business Server 4.0a
 * Microsoft BackOffice Small Business Server 4.0

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This article was previously published under Q196266



SYMPTOMS
When you upgrade the Windows NT Server portion of BackOffice Small Business Server to a retail Windows NT Server, the DHCP server files are not updated to allow for the upgraded server to run DHCP with an existing DHCP server on the same network.



CAUSE
By default, BackOffice Small Business Server disables its own DHCP server service upon startup if it detects another DHCP server on the network. This is by design to prevent the SBS server from becoming a rogue DHCP server when installed on an existing IP network.

When upgrading the Small Business Server to Windows NT Server 4.0, the DHCP service does not remove the rogue DHCP server functionality. This prevents an upgraded Small Business Server from being used with an existing DHCP server.



RESOLUTION
If redundant DHCP servers are required, configure two separate DHCP servers to service the local clients requests and remove the DHCP service from the Small Business Server.



MORE INFORMATION
For upgrade information, refer to the following Web site:

http://www.microsoft.com/ smallbusinessserver

For additional information, please see the following article in the Microsoft Knowledge Base:

177610 Event ID 20036 with Small Business Server DHCP Server

Additional query words: kbDSupport smallbiz

Keywords: kbprb KB196266

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