Hi,
Taken officially from microsoft site:
We want to update all our loyal customers about the service outages that many of you are experiencing today. It is not a technical issue. This morning, Microsoft served a federal court order and seized 22 of our most commonly used domains because they claimed that some of the subdomains have been abused by creators of malware. We were very surprised by this. We have a long history of proactively working with other companies when cases of alleged malicious activity have been reported to us. Unfortunately, Microsoft never contacted us or asked us to block any subdomains, even though we have an open line of communication with Microsoft corporate executives....etc...etc....
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Bye