I have an issue where users are being prompted for username and password for our MOSS 2007 Intranet site. The strange thing is this prompt originates mostly from OutLook 2007, but can come from any office application.
A typical scenario is a user will be in Outlook (Browser does not have to be open) and suddenly a credential prompt will appear with the Outlook icon in the Windows tray. In the title bar is the FQDN of our SHarePoint site, so it prompts for credentials to SiteName.DomainA.com. Normally users access the site with Sitename.com (No domain name) Strange thing is that this happens with other Office applications too.
None of the admininistrators get this prompt and if the user simply presses the cancel button enough times the prompt goes away. If they try to enter their credentials the prompt comes back and eventually locks out the user's AD account. We are using NTLM and users are automatically logged into the site when accessing it via the browser so Im not sure what could be causing this.Any help is greatly appreciated.