There will be times when an application will require more resources than it once did. In cases such as these, an Azure VM can be resized. 

Resizing a VM requires the use of two different PowerShell commands. The first command, called Get-AzureRmVMSize, is used to retrieve a list of VM sizes available in a chosen region. Before resizing a virtual machine, you must ensure that whatever size you want to change the virtual machine to is available in the virtual machine's region. The Get-AzureRmVMSize command does exactly this.

The second command that is required the Update-AzureRmVM command. This command is used to update a VM after changing its size configuration.