All, I'm trying to troubleshoot a few authentication problems. Firstly, understand I am running an NTLM setup. All my authentication is transparent to the user. That being said, on occasion my browser window pop for authentication. Canceling the prompt is usually sufficient to proceed. Does anyone know why this happens? Second issue. When a user is posting a yahoo email message they receive a "Cache access denied" and told they need to authenticate themselves. I'm looking mostly for some troubleshooting steps, as I'm not certain there is a clear solution to either issue. Thanks! Jason