This morning I am getting the following message \"This account is on a deprecated billing system. Contact Support to move it to the new system.\" when I open my subscription
I am having the same issue with one of the subscriptions I own. Getting the message: This account is on a deprecated billing system. Contact Support to move it to the new system.
By personal experience it should be a matter of waiting it out, since the resources on that subscription are completely offline and they are not even in the affected region. To follow progress on it go to status.azure.com or follow them on twitter Azure Support. 41 minutes ago, there is still no definite resolution.