I have a new server in a site that intermittantly dissapears off the network. This is the only server in this domain so it is the DC as well as the file server, DNS, DHCP etc. Approximately once a week I get a call from someone saying that they can't connect to their F: drive which is mapped to a share on this server. They have internet access and email (which is hosted off site), but can't connect to their file server. I can log into the server from outside and can browse to any of the workstations and there are no performance issues or events logged. I'm at a loss where to look for problems.