I've seen quite a few forum posts of late asking something along the lines of "Why can't I create A series VMs anymore?" So, I thought it worth a quick post to detail what's up and how to fix it.
The problem here is that if you use the Azure Portal to create a VM and use the defaults provided, when you go to select a VM, you're presented with a window like this:
Even when you go to "View All," you're still only presented with DS, FS, and GS series VMs. You can't find A, D, F, G or N series VMs. So what's going on?
The clue is in the fact that only the *S series are available. The portal has defaulted to selecting SSD based VMs that use premium storage, I suspect due to the general recommendation to use premium storage for production VMs to get things like single instance SLAs.
To get access to the non-premium storage VMs, you need to go back a step to the basics section and make sure you select "HDD" in the drop down for "VM Disk Type." Once you select this and move onto the Size screen, you should then be able to select all the non-S SKUs.
Note that to get the new GPU-based N series VMs, you also need to select HDD, as these VMs don't contain SSDs.