# Installing the Tentacle VM extension via the classic Azure Portal

:::div{.problem}

The VM extension is deprecated and no longer supported. All customers using the VM extension should migrate to [DSC](/docs/infrastructure/deployment-targets/tentacle/windows/azure-virtual-machines/via-an-arm-template-with-dsc).
:::

The Azure VM Extension cannot be installed via the Classic Azure Portal, as it lacks support for adding extensions. We recommend either using the new Azure Portal, or using the [CLI](/docs/infrastructure/deployment-targets/tentacle/windows/azure-virtual-machines/via-the-azure-cli/) or [PowerShell](/docs/infrastructure/deployment-targets/tentacle/windows/azure-virtual-machines/via-powershell) methods.

For further information, please see the [Microsoft documentation](https://docs.microsoft.com/en-us/azure/virtual-machines/windows/classic/manage-extensions?toc=%2fazure%2fvirtual-machines%2fwindows%2fclassic%2ftoc.json).