358 votesunder review · AdminAzure IaaS Engineering Team (Azure IaaS Engineering Team, Microsoft, Microsoft Azure) responded
The status of this item has been moved back to Under Review. We initially planned to move to VHDX support as part of our support for HyperV Gen2 VMs, but we ended up using the VHD format for Gen2 VMs as well. Some aspects of the Azure Infrastructure do not cleanly support VHDX OS or data disks. So this feature is dependent on some of these internal services being updated which is an ongoing process.
This remains on our long-term backlog as something we want to offer