For users receiving the following alert within Microsoft Outlook 2007 when utilizing Windows XP as your operating system:
“The server you are connected to is using a security certificate that cannot be verified.
The target principal name is incorrect.
Do you want to continue using this server?”
The alert is a result of Windows XP's Root Certificates being out-of-date. The user will need to perform the optional Root Certificate update on the impacted computer. Also, all Microsoft Office 2007 updates need to be performed as well. The update for Root Certificates for Windows XP can be located here.
This item updates the list of root certificates on your computer to the list that is accepted by Microsoft as part of the Microsoft Root Certificate Program. Adding additional root certificates to your computer enables you to use Extended Validation (EV) certificates in Internet Explorer, a greater range of security enhanced Web browsing, encrypted e-mail and security enhanced code delivery. After you install this item, you may have to restart your computer. Once you have installed this item, it cannot be removed.
Information on updates for Office 2007 can be located here.