Users can become quickly discouraged with SharePoint if they are constantly prompted for their credentials during a web session.  This is particularly frustrating for users who have already established their domain authentication in other web sessions such as OWA.  To eliminate this problem, make the following changes in Internet Explorer settings to allow the authenticated credentials to be passed to SharePoint:

1. In Internet Explorer, select Tools/Internet Options. The Internet Options dialog appears.
2. Select the Security tab, click the “Trusted Sites” icon at the top, then click the “Custom Level…” button at the bottom. The Security Levels dialog appears.
3. Scroll all the way down to the bottom to the User Authentication/Logon options, then click “Automatic logon with current user name and password.”
4. Click OK, and save settings as requested