I just moved DHCP services from a Windows 2003 server that’s about to be decommissioned to a new Windows 2008 server during office hours with no service interruptions; the scope, reservations and all were moved over to the new server with no issues. here’s how i did it:
First log into your 2003 DHCP server with an administrator account. click start, run, type “cmd” and hit enter. in the command prompt type
netsh dhcp server export C:\dhcp.txt all
That will back up all your DHCP settings to the specified location, in this case “C:\dhcp.txt”.
Next up login to your soon to be 2008 DHCP server as an administrator and copy the dhcp.txt file over to the c: drive. now verify that you have the DHCP role running, and open up another cmd window, but this time type
netsh dhcp server import C:\dhcp.txt all
That should do it! just shut down the old DHCP service and your migrated!
Note: my first try i did get this message:
Error while importing option “6.”
This option conflicts with the existing option “” An internal error occurred.
Nothing to worry about, just go into your 2008 DHCP settings and remove the server options that were automatically imported. I had to remove my 006 DNS Servers and time server stuff.
If you have any questions or need help leave a comment.

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Thanks, i had the Error while importing option “6.” “issue”
Thanks for the simple solution, i shoud have firured itout myself hehe….