Azure Image gellery will not create image due to faulty null in IsAccleratedNetwork

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Azure Image gellery will not create image due to faulty null in IsAccleratedNetwork

abcd1234! 20

I am trying to create images of windows VMs in a compute gallery. I allways get the error message that accelerated networking would be set to null. While when checking via portal and via CLI I can see that it is actually true. Seems to be a bug. See screenshots. Please help.
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Dharani Reguri 1,175 Reputation points Microsoft External Staff Moderator

2025-05-20T13:13:07.0433333+00:00

Hi abcd1234!,

I understand that you are seeing error while trying to create image in compute gallery regarding mismatch in the IsAcceleratedNetworkSupported property between the source VM and the image you're trying to create.

When you're capturing a VM as an image in the Azure Compute Gallery, Azure checks if the VM's settings match what you're specifying for the image including the IsAcceleratedNetworkSupported property.

If the VM is meant to support Accelerated Networking, you can manually set IsAcceleratedNetworkSupported to True. This can be done via the Azure Portal, Azure CLI, or PowerShell. If Accelerated Networking isn’t required, remove or change the IsAcceleratedNetworkSupported property when defining the image.

If you're unable to change the current VM’s configuration, use a different VM that matches the image requirements. First, capture the VM as a managed image, and then add that image to the Azure Compute Gallery.

Please refer to the document for Capture a VM in the Azure Portal

If you have any further queries, let me know. If the information is helpful, please click on Upvote.

Thank you.
abcd1234! 20 Reputation points

2025-05-20T14:09:52.0533333+00:00

The NIC of the VM I am trying to create a image from has accelerated networking enabled. Still on creation this bogus error message appears. There is no actual missmatch. Image definition and VM have it enabled and still it says the VM has null in the error.

Nic:

This should work. Can we please have a remote support session to check this?

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Dharani Reguri 1,175 Reputation points Microsoft External Staff Moderator

2025-05-20T13:13:07.0433333+00:00

Hi abcd1234!,

I understand that you are seeing error while trying to create image in compute gallery regarding mismatch in the IsAcceleratedNetworkSupported property between the source VM and the image you're trying to create.

When you're capturing a VM as an image in the Azure Compute Gallery, Azure checks if the VM's settings match what you're specifying for the image including the IsAcceleratedNetworkSupported property.

If the VM is meant to support Accelerated Networking, you can manually set IsAcceleratedNetworkSupported to True. This can be done via the Azure Portal, Azure CLI, or PowerShell. If Accelerated Networking isn’t required, remove or change the IsAcceleratedNetworkSupported property when defining the image.

If you're unable to change the current VM’s configuration, use a different VM that matches the image requirements. First, capture the VM as a managed image, and then add that image to the Azure Compute Gallery.

Please refer to the document for Capture a VM in the Azure Portal

If you have any further queries, let me know. If the information is helpful, please click on Upvote.

Thank you.
abcd1234! 20 Reputation points

2025-05-20T14:09:52.0533333+00:00

The NIC of the VM I am trying to create a image from has accelerated networking enabled. Still on creation this bogus error message appears. There is no actual missmatch. Image definition and VM have it enabled and still it says the VM has null in the error.

Nic:

This should work. Can we please have a remote support session to check this?

Answer 1

Hi abcd1234!,

Thanks for sharing the screenshots.

As said, you will need to either select an Image Version source that matches the properties of the Image Definition or create a new Image Definition with properties that will allow that image source.

But this might be happening because acceleratedNetwork is disabled under source VM's OS disk supported capabilities. To fix that, use the command below to enable acceleratedNetwork at source VM's OS disk:

az disk update -n <source VM's os disk name> --resource-group <resource group> --accelerated-network true

If Source OS disk does not have NVMe property, we can update the property using CLI.

az resource update --ids /subscriptions/<SubID>/resourceGroups/<RGname>/providers/Microsoft.Compute/disks/<DiskName> --set properties.supportedCapabilities.diskControllerTypes=SCSI,NVMe

If you have any further queries, let me know. If the information is helpful, please click on Upvote.

Thank you.

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Azure Image gellery will not create image due to faulty null in IsAccleratedNetwork

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