This article discusses how to change a computer's IP address from static to DHCP from a remote location : Q194407

DHCP Tips:

Export DHCP db
Use jetpack.exe to compress WINS and DHCP databases
Jet Compact Utility Available in Download Center
Remotely Reconfigure IP from Static Addressing to DHCP
Restore a Corrupted DHCP Database File
DHCP Stops Assigning IP Addresses to Clients
Enable DHCP Logging

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