We have one PC that cannot connect to a W2K3 server for some reason. It cannot browse to it, it cannot ping it, it cannot open up the user's mailbox (it is an Exchange server), and the server cannot connect to the PC (can't ping, browse, etc). The PC isn't having any other connection issues with any other server, and the server is working fine for everyone else. I had an issue awhile ago where the number of connections had maxed out from one machine and a registry modification had to be made (deleting the entry or something), but I cannot find the resolution at all now, any ideas? Thought if it was a TCP/IP stack corruption or DNS issue, it would affect every connection on this workstation, but it's just the connection to the mail server...thanks for any help with this issue!