KB Article: http://support.microsoft.com/kb/2589415
Consider the following scenario:
- You configure Microsoft Outlook 2010 to publish and retrieve Internet free/busy information that is stored on a server.
- The server uses the HTTPS protocol and requires a password for authentication.
- You publish Internet free/busy information to the server by using Microsoft Outlook 2010 on a computer that is running Windows 7.
In this scenario, you are not prompted for authentication. Additionally, the Internet freebusy information is not published or retrieved successfully.