Custom Script Extension for Windows

The Custom Script Extension downloads and executes scripts on Azure virtual machines. This extension is useful for post-deployment configuration, software installation, or any other configuration or management tasks. Scripts can be downloaded from Azure storage or GitHub, or provided to the Azure portal at extension run time. The Custom Script Extension integrates with Azure Resource Manager templates and can be run using the Azure CLI, PowerShell, Azure portal, or the Azure Virtual Machine REST API.

• Please note that custom script extension has a maximum execution time of 90 mins

Tips and Tricks for Custom Script Extension for Windows | Microsoft Docs