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Thanks guys, I'll try both suggestions.
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With one big exception office LAN has run nicely with an old Windows Server 2003 playing the role of domain controller, DHCP server, and DNS server. That one exception: client machines are SLOW to pull an IP from DHCP. <br />
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The slow IP acquisition is independent of the connection type to the network. Ethernet and wireless are both slow.
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We introduced a new Windows Server 2012 domain controller in July. We were hoping that the new box would address the IP issue. No luck. (It's worth noting that the old Windows 2003 domain controller is still online for another week or two.)
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The slow IP acquisition is giving us trouble with GPO assignments and login script execution.<br />

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Ideas?
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With one big exception office LAN has run nicely with an old Windows Server 2003 playing the role of domain controller, DHCP server, and DNS server. That one exception: client machines are SLOW to pull an IP from DHCP. 

The slow IP acquisition is independent of the connection type to the network. Ethernet and wireless are both slow.
We introduced a new Windows Server 2012 domain controller in July. We were hoping that the new box would address the IP issue. No luck. (It's worth noting that the old Windows 2003 domain controller is still online for another week or two.)
The slow IP acquisition is giving us trouble with GPO assignments and login script execution.


Ideas?

Clients in Windows network are SLOW to pull IP.

The Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol. DHCP allows for computers to be configured automatically to communicate with each other over an IP network without the need for manual setup by a network administrator. The implementation of DHCP relies on a DHCP server to hand out network configuration information to DHCP-capable clients that request an IP address (and other information required or useful in communicating with other devices on an IP network). In addition to an IP address, common configuration information served over DHCP includes a default gateway, subnet mask and DNS sever(s).

DHCP

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.

Windows Server 2012

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).