Microsoft claimed it had fixed the problem that had kept some users from logging on to its online services. And Microsoft said it could state with absolute certainty that the launch of Windows Server 2008 had nothing to do with the problems. The company has, however, yet to explain the outage, which left users unable to access everything from Windows Live Mail - formerly Hotmail - and Xbox Live to Skydrive Live and Live Messenger.
Coincidentally, hours before the outage began, Bob Muglia, the head of Microsoft's server group, bragged that "a good part of the Windows Live servers are running Windows Server 2008". The latter, Microsoft's newest server operating system, launched yesterday. Yesterday, however, Microsoft said the problem had been resolved and all services were available.
Source:→ PC Advisor
Microsoft, Windows Live, Windows Live ID, Service Outage