You can find additional details regarding the incidents on Feb 3rd and Feb 4th from Brian Harry's blog posts at the links below:
https://blogs.msdn.microsoft.com/bharry/2016/02/05/vs-team-services-incidents-on-feb-3-4/
https://blogs.msdn.microsoft.com/bharry/2016/02/06/a-bit-more-on-the-feb-3-and-4-incidents/
Our sincere apologies for the inconvenience we know that these incidents have caused our customers.
VS Team Services Service Delivery Team