I rebooted one of our VM at Midnight Dec 10 2014 (after installing regular windows updates) it has not been available either by remote desktop or any of the websites or other services running on it.
On the Azure Portal it says the VM is running.
Our 4 other VM in the same region are all still running fine.
I had received an email from the Azure Team warning about removing earlier version of the Storage Service API on Dec.9... could this be related?