Hello, We have a Windows 2003 Domain called Domain A with a DHCP Server and DNS . We have an other Windows 2008 Domain called Domain B with DNS . We have a trust between Domain A and B . Now, Workstations from Domain A receive Ip Adresse by DHCP. Now, Workstations from Domain B use static IP Adresses. We would like that workstation from Domain B receive Ip adresse by DHCP . What is the best practices ? Can we use DHCP Server From domain A to send Ip Adresse to workstation from Domain B ? Do we have to insall DHCP server in Domain B ? Thanks for your answer. Regards,

Can we use DHCP Server From domain A to send Ip Adresse to workstation from Domain B ? Yes, you can use DHCP Server from Domain A to broadcast IP addresses to Domain B computers. DHCP is not AD dependent (besides the authorization issue), hence it can lease IPs to any computer, regardless of its domain; provided necessary changes have been done at your network level such as required ports, Vlans are allowed to enable workstations in domain B to receive IP from DHCP server from Domain A. What is the best practices ? In my perception, its better to have DHCP server per Domain to avoid unforeseen issues such as port restrictions, DNS issues or something else etc... Do we have to insall DHCP server in Domain B ? Its up to you and your IT team to decide whether or not to go for a new DHCP server in Domain B. As there is a way to have a DHCP server in Domain A to serve as DHCP for Domain B as well. That said, Aforementioned suggestions are from my perception only. You may want to wait to hear from other forum members as well.

Hello, Now, Workstations from Domain A receive Ip Adresse by DHCP. Now, Workstations from Domain B use static IP Adresses. That is perfectly normal as assigned DNS suffix by DHCP server may cause problems for users of the second domain. We would like that workstation from Domain B receive Ip adresse by DHCP . What is the best practices ? I would recommend separating users using two subnets. In each subnet, configure a DHCP server with right DNS suffixes. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator Microsoft Certified IT Professional: Server Administrator Microsoft Certified Trainer