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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(115.19999999999999, 13%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ED%3C/text%3E%3C/svg%3E)
Got this error message when deploying Azure Virtual Desktop with "Azure Virtual Desktop Getting started"
VMExtensionProvisioningError: "VM has reported a failure when processing extension 'Microsoft.Compute.CustomScriptExtension'. Error message: "Failed to download all specified files. Exiting. Error Message: CustomScript failed to download the blob fileUri_{2} because it does not exist. Please create the blob and try again, the response code and message returned were: "The remote server returned an error: (404) Not Found. The specified blob does not exist.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(300.8, 11%, 39%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETH%3C/text%3E%3C/svg%3E)
Hello DVA
The error message indicates that the deployment of Azure Virtual Desktop (formerly known as Windows Virtual Desktop) encountered an issue with the 'Microsoft.Compute.CustomScriptExtension' extension. Specifically, it failed to download one or more specified files.
The error message suggests that the blob file specified in the custom script extension does not exist or cannot be found. The custom script extension relies on a file or files stored in Azure Blob Storage to execute a script or perform certain actions during the deployment process.
To resolve this issue, you can follow these steps:
Check the specified file URI: Review the deployment configuration and ensure that the file URI provided for the custom script extension is correct. It should point to the valid location of the script or file in Azure Blob Storage.
Verify the existence of the blob file: Confirm that the blob file referenced by the file URI actually exists in Azure Blob Storage. You can navigate to the Azure Storage account and container specified in the deployment configuration to verify the presence of the file.
Ensure proper access permissions: Make sure that the necessary permissions are set on the Azure Storage account and container to allow the Azure Virtual Desktop deployment to access the blob file. This includes both read and execute permissions.
Retry the deployment: If you have corrected any issues with the file URI or blob file, you can retry the Azure Virtual Desktop deployment. Ensure that you use the updated and corrected deployment configuration.
If the problem persists even after verifying the file URI, blob file existence, and access permissions, you may need to review the deployment logs or contact Azure support for further assistance. They can provide more specific guidance based on the detailed error logs and diagnose any underlying issues.
Hello DVA
Welcome to Microsoft Q&A Platform, thanks for posting your query here.
Did you specify a custom script during deployment?
If yes, can you verify that the URI which contains your custom script is accessible?
If you didn’t specify a script and the deployment is failing via getting started wizard, request you to please open a support case logged to investigate this.
Good morning vipullag-MSFT
You must test AVD GET STARTED this one does not work... the scripts must be updated by Microsoft.
Find the error yourself and fix it.
It's a shame 10 messages and you pretend you don't understand the problem...
Hello Jérôme Sanchez
Apologies for all the inconvenience this issue may have caused.
There are support cases filed for investigating the issue.
I have escalated this with internal team.
The deployment was done using Azure Virtual Desktop environment in one step and Azure Storage account was deployed automatically. Looks like there are some issue with templates that Microsoft uses.
DThe "easy-button-avdsetup-linked-template" return an error:
Can someone from Microsoft take a look at this template?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(204.8, 85%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA0%3C/text%3E%3C/svg%3E)
having exact same issue. Did you receive any update on this yet?
hello
same error !
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
I'm also getting this error. I used the one click "Getting started" deployment with nothing custom at all. Retried several times with different names for resource groups etc incase a name was an issue.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(92.8, 14.000000000000002%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETP%3C/text%3E%3C/svg%3E)
There is a Sev-A ticket in with Azure Engineering on this topic currently, I was having the same issue and it is currently being worked on. Below is the link to the post where the engineers should post an update. https://learn.microsoft.com/en-us/answers/questions/1314309/azure-virtual-desktop-customscriptextension-error?comment=question#newest-question-comment
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(64, 32%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAO%3C/text%3E%3C/svg%3E)
I am also getting the exact same error. Can someone from Azure team please provide some directions on how to resolve this?
There is a Sev-A ticket in with Azure Engineering on this topic currently, I was having the same issue and it is currently being worked on. Below is the link to the post where the engineers should post an update. https://learn.microsoft.com/en-us/answers/questions/1314309/azure-virtual-desktop-customscriptextension-error?comment=question#newest-question-comment