Windows 2012 remote desktop

Hi there. I am looking into windows R2 and an effective replacement for Remote Web Workspace. There is the R2 essentials experience that seems to work - I am confused about the remote desktop services licensing. I just need remote workers to be able to vpn in or remotely control a desktop - can anyone enlighten me - do I need to purchase remote desktop services licenses for devices and users accessing the system remotely?
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Luis MouraCommented:
How many users?
You already have build-in license.

Remote Desktop supports two concurrent connections to remotely administer a computer. You do not need a license server for these connections.
jad2009Author Commented:
There are 25 users in total with 5 of these requiring remote access. What are the remote desktop licenses required for? (thanks!)
I just need to ensure that I don't under estimate the licensing costs :-)
Luis MouraCommented:
Remote Desktop Licensing (RD Licensing), formerly Terminal Services Licensing (TS Licensing), manages the Remote Desktop Services client access licenses (RDS CALs) that are required for each device or user to connect to a Remote Desktop Session Host (RD Session Host) server.

You can check this website

But you will need to buy a few licenses.

But if you check here
windows 2012 Standart have 10 CALS

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Windows Server 2012

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