Deployment failed

Deploying this template failed with error :
{"code":"DeploymentFailed","message":"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/arm-debug for usage details.","details":[{"code":"Conflict","message":"{\r\n \"status\": \"Failed\",\r\n \"error\": {\r\n \"code\": \"ResourceDeploymentFailure\",\r\n \"message\": \"The resource operation completed with terminal provisioning state 'Failed'.\",\r\n \"details\": [\r\n {\r\n \"code\": \"VMExtensionProvisioningError\",\r\n \"message\": \"VM has reported a failure when processing extension 'InstallDomainController'. Error message: \\\"The DSC Extension failed to execute: The background process reported an error with the following message: ..\\nMore information about the failure can be found in the logs located under 'C:\\\\WindowsAzure\\\\Logs\\\\Plugins\\\\Microsoft.Powershell.DSC\\\\2.79.0.0' on the VM.\\\".\"\r\n }\r\n ]\r\n }\r\n}"}]}

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[Template Name goes here](Template link goes here)

### Issue Details

### Repro steps (*if necessary, delete otherwise*)
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No template link or usable reproduction steps are provided. Start by identifying the affected template, then inspect the Azure deployment operations and the VM logs under C:\WindowsAzure\Logs\Plugins\Microsoft.Powershell.DSC\2.79.0.0. Done requires a reproducible cause for the InstallDomainController failure and a documented fix.

Written by the indexing model from the issue text.