An Azure service that is used to provision Windows and Linux virtual machines.
This error normally appears when you perform move or migrate at the time of platform maintenance.
If this is the reason, then you should see issues moving to new subscriptions for resources related to VM's. Please retry the move operation and let us know if you are still facing issues.
Hope this helps! If you are still facing issues we can work with you directly to troubleshoot and resolve this.
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