I'm running Server 2012 Essentials on a new Dell PowerEdge T110 in a small office. Internet is through a cable service and the cable modem occasionally needs to be restarted along with the router. Client computers are not able to reconnect to the domain after these devices are reset. I have to manually restart DHCP services on the server to get clients reconnected. DHCP is turned off on the router, so that's not the problem. I have not experienced this problem before and I'd like to resolve the issue. All help is appreciated!