On Tuesday evening and Wednesday, many Microsoft customers had difficulty accessing the company's Web sites. The cause has been determined, and the issue is resolved. The mistaken configuration change limited communication between DNS servers on the Internet and Microsoft's DNS servers. This was an operational error, and not the result of any issue with Microsoft or third-party products nor the security of our networks. Microsoft regrets any inconvenience caused to customers due to this issue.
All sites are currently available to customers.
Again, Microsoft apologizes for the inconvenience. Please contribute it.