We run a .bat file at login on our Windows domain. We have a Windows 2003 Server domain controller, and Exchange 2003 server, and a Windows 2003 Member Server on our network. The batch file simply maps netword drives to our client PC's. I find that pretty much everyday, these dive mappings seem to go away. They don't go away in the sense that they dissappear, but rather just say "disconnected". I simply double click on then, and it will reconnect (individually). We have a couple Windows 2000 Pro machines, and their network drives get a red X on them and sometimes double clicking on them don't bring them back to life. I can't seem to figure out the frequency or timing on when they get disconnected. Any ideas?