I have a small LAN with about 50 PC's, and today when people logged out and then logged back on they can't connect to the DHCP server. I have checked the AD server that serves DHCP and the server is up and running, If I run ipconfig and release/renew the renew fails stating it can't connect to dhcp server. I have restarted The DHCP Client and Server in the AD server with no luck.
Why would the DHCP Server become invisible ? These systems have been running for between 2 and 5 years??
They are seeing the Domain Controller on the same server??? and execute logon.bat files???