VDA is a subscription authorization (subscription per device/year) for devices (contractor devices, employee personal computers, thin clients) in the enterprise that are not authorized by s a to access virtual desktops. When users access VDI desktops using devices that have not purchased SA (such as thin clients), they need to purchase VDA licenses. When using third-party devices (such as personal computers of contractors or employees) to access VDI desktops, VDA is also needed.

VDA is the interest of SA, and users who buy SA no longer need to buy VDA.

CSL is the authorization of Windows secondary devices and an optional subscription additional function, which can grant any type of personal devices and non-X86 devices owned by the company the right to access the company desktop through VDI or Windows To Go. The premise of purchasing CSL is that the main equipment of this secondary equipment has already purchased SA, VDA and Windows Intune.

After collecting all the above permits, can you summon the dragon? Don't!

You also need to purchase a management license for the VDI infrastructure. Microsoft offers two options:

Option ①: Remote Desktop Services CAL (Remote Desktop Services Access License)

If the enterprise has purchased the client management license of System Center Configuration Manager and the Microsoft Desktop Optimization Package, it is enough to purchase the remote desktop service CAL.

Option ②: VDI Suite (Virtual Desktop Infrastructure Package)

The purpose of VDI Suite is to simplify licensing and reduce licensing fees. The following are the contents of the VDI suite:

Remote Desktop Services CAL (limited functionality)

System Center Configuration Manager client management license (with limited functions, it is actually a license for VMM client management).

Microsoft desktop optimization package authorization

In short, VDI is expensive, and licensing is not cheap at all. If you just want to save costs, then VDI is not your ideal choice. However, from the perspective of enterprise management, VDI can still bring us great value:

First, cross-platform rapid deployment of enterprise applications, especially in the medical education industry, only needs a thin client to realize cross-platform application interaction, distance education, HIS system and so on.

Second, to improve the management level of enterprises, the desktop is no longer dependent on the client, which can facilitate the unified management of IT, and the user's desktop and data are managed separately, so that IT personnel can spend more time on construction rather than fire fighting.