The process of resizing a NSv Azure virtual machine is summarized in the below steps
Log in to Azure portal portal.azure.com with your credentials.
On successful login, select the Virtual Machine icon.
Select the virtual machine for resizing from the list of virtual machines displayed.
Select on the Size icon on the left panel.
After clicking on the Size icon from left panel, below screen is displayed.
Select the size and click Resize button below the screen. Before clicking on resize ensure that resizing is supported.
It takes some time to change the size. Once done you can go to step 4 and check the updated size.