Hi
It is at least very disappointing that I cannot upgrade the VM to D series because the cluster does not support it... It's up to Azure to move the VM to the cluster which support D series! I’m not responsible for the infrastructure.
The solution must be that Azure moves the VM to a better cluster (behind the scenes) or to upgrade the cluster in which we are.
This was not advertised. What was advertised is that I can select and change the VM at choice.