Yes. A VM can be associated with a Windows Server CAL and Windows Server Home Edition CAL. But, you will need to purchase a Windows Server CAL for the VM that is associated with those CALs. The VM will only be able to access the resources that are defined in the VM's license file. For more information about licensing Windows Server in Azure, see http://msdn.microsoft.com/en-us/library/ff460606.aspx .
The reason we offer the option is that we would like to offer a simpler, low-cost option to our customers. Most of our customers who have chosen to use Windows Server with Azure have been using the free trials of Windows Server. I would caution that the free trial of Windows Server is not available for use outside of the Azure Virtual Machine environment. For more information on free trials please refer to http://msdn.microsoft.com/en-us/library/ff537647.aspx .
You will need to download the ISO image of the Windows Server workload you want to try. You will then need to create a VM from that ISO image. Once you have the VM, install the workload of your choice. Once it is installed, you can then remove the ISO from the VM. For more information, see http://blogs.technet.com/b/askcore/archive/2013/04/28/windows-server-2012-preview-virtual-machine-install-guide.aspx .
OpenVPN servers are servers maintained by other people. This means that you cannot download the OpenVPN software directly from an OpenVPN server, just like you cannot download software from any other website. If you wish to run OpenVPN on your own server, you need to purchase a license. If you wish to connect to an OpenVPN server, you need to have the OpenVPN software on your PC, Mac or mobile device. If you wish to have OpenVPN software on your server, you need to purchase a license.
Microsoft has received some complaints that the Windows Server Small Business Server will no longer be available on July 15, 2015. So, we are listing the Windows Server Essentials instead. However, please note that our current OpenVPN Access Server 827ec27edc