Add vmNIC to Azure Virtual Machine

Q: How do I add additional vmNICs to an existing virtual machine?

A: You can't currently add vmNICs to an existing Azure virtual machine. The vmNICs must be added at the time of virtual machine creation. If you have an existing virtual machine that you want to add vmNICs to, you'll need to delete the virtual machine while keeping the VHDs and then create a new virtual machine using the existing VHD while adding the new vmNICs as part of the provisioning.