I am running Exchange 5.5 on an NT 4.0 server, both are fully patched. I currently have IIS set up on a separate box that has Outlook Web Access running on it. About 2 months ago, I had an issue with users being unable to check their mail using OWA. After entering the URL, the login box would pop up. After entering the username and password, the page would simply hang/do nothing. The browser was still functioning, but the page would not load. After rebooting the web server, OWA would work as normal for 3 hours to 3 days. I updated as much as I could at that time, and the problems appeared to go away. The same symptoms started happening again today. After a reboot, things are working normally again, but I want to eliminate this problem. Any help would be super cool!