Cant see add button for vm extension on new azure portal. I want to add dsc extension for my windows vm on new azure portal but there is not Add button on extension configuration.enter image description here
It is not yet possible to add extensions to existing VMs in the new portal. We can imagine that it will come soon. The mechanisms you can use is set-azureRmVMExtension with the extension and the parameter info which can be found at https://azure.microsoft.com/en-us/documentation/articles/virtual-machines-extensions-configuration-samples-windows/. This has schema information for Puppet, Antimalware and other extensions.
I hope this answers your question. Regards
