I recently setup a new SBS 2003 server for a customer. Everything worked fine for several months but suddenly the network clients (all set to use dhcp) could no longer retrieve an IP address from the SBS DHCP server - they just do not get a response. It is a very standard DHCP configuration, nothing out of the ordinary.I have tryed everything i can think of (several times) but cannot get the server to issue addresses any more. I have tried: rebooting the server, restarting the dhcp server service; de-authorizing the scope (and re-authorizing), deleting the scope and recreating it but nothing seems to work. I have also tried (several times) ipconfig /release then ipconfig /renew as well as the local area connection repair option. This is the only dhcp server on the network, there is a router but the dhcp server part of it is turned off. I have manually given all pc's a static address which is working but would like to fix the issue. There are no event log entries relating to DHCP.If anyone can give advice on this problem i would greatly appreciate it.Many thanks,Paul Hollings.

Hi. Is it sbs premium with ISA? Did you autorize the dhcp server?

Sorry for delay.It is SBS standard - No ISA. Yes i did authorize the the DHCP server (several times while trying everything i could think of).Thanks.

Check the switches between the server and client. Maybe it blocks some traffic. Are there any firewall on the server? Trend officescan? Windows Firewall? You could also run net monitor on the client and server to monitor what happes. I usually use wireshark for that kind of operation. Oddvar Moe www.moe.am

Does client PC shows the DHCP Server IP address when you do IPConfig on client workstation ? If not thencheck if ports 67 and 68 are blocked anywhere between DHCP Servers and Clients.