I have Exchange 2000 running on Windows 2000 server. Once a week (usually on Saturday), no one can access the server (they use Outlook) locally or remotely. When I check the server, it looks like it's running fine. I can ping to it from my desktop, but I can get to email. I do notice when I open internet explorer, It can't access the internet. It's as if all the protocols stop working. I can't find anything in the Event Log to tell me what is going on. I end up rebooting the server and than it starts working. Any ideas?