Trying to deploy AVD but the operations fails with the message: reported a failure when processing extension 'Microsoft.PowerShell. DSC'

Question

"The resource write operation failed to complete successfully, because it reached terminal provisioning state 'Failed'.\",\r\n    \"details\": [\r\n      {\r\n        \"code\": \"VMExtensionProvisioningError\",\r\n        \"message\": \"VM has reported a failure when processing extension 'Microsoft.PowerShell.DSC' (publisher 'Microsoft.Powershell' and type 'DSC'). Error message: \\\"The DSC Extension failed to execute: Error downloading https://wvdportalstorageblob.blob.core.windows.net/galleryartifacts/Configuration_1.0.02384.163.zip after 17 attempts: Unable to connect to the remote server.\\r\\nMore information about the failure can be found in the logs located under 'C:\\\\WindowsAzure\\\\Logs\\\\Plugins\\\\Microsoft.Powershell.DSC\\\\2.83.5' on the VM.\\\". More information on troubleshooting is available at https://aka.ms/VMExtensionDSCWindowsTroubleshoot. \"\r\n      }\r\n    ]\r\n  }\r\n}"

Answer 1

Hi

Looking at this error:

"Error downloading https://wvdportalstorageblob.blob.core.windows.net/galleryartifacts/Configuration_1.0.02384.163.zip after 17 attempts: Unable to connect to the remote server."

It looks like there is an outbound connectivity problem reaching that destination.

Do you have NSG's applied to the AVD Subnet that is blocking outbound traffic, or is there an Azure Firewall deployed where you need to open outbound ports?

For info, the list of required Ports/URL's is here:

https://learn.microsoft.com/en-us/azure/virtual-desktop/safe-url-list?tabs=azure

Hope this helps,

Thanks

Michael Durkan

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