For the past several hours Azure has been down which is preventing 365 Command Users from signing in. The Azure Service Dashboard currently reports:

Storage is currently experiencing a Worldwide outage impacting HTTPS operations (SSL traffic). Status of affected services will be updated in the table below. We have identified the root cause and are validating the recovery options before implementing them. Further updates will be published to keep you apprised of the situation. We apologize for any inconvenience this causes our customers.

We have redundancy built into 365 Command, but when all of Azure is down like it is now, it doesn’t do any good.  You can view the current status of the Azure outage by visiting:

http://www.windowsazure.com/en-us/support/service-dashboard/

Hopefully it will be back up soon!