If you connect to a MetaFrame Presentation Server 3.0 (MPS3) via RDP, you’ll consume a Citrix connection license. Most people thought this was a bug, but in fact it’s by design.
In previous versions of MetaFrame, RDP connections did not consume Citrix licenses.
One of the new features of MPS3 is that users can connect via the Web Interface using ICA or RDP. Since RDP users are “managed” using Citrix tools, Citrix figured that people should pay for that management by requiring that RDP connections consume Citrix connection licenses.
The MPS3 Administrator’s Guide mentions that RDP web connections consume Citrix licenses, but it doesn’t mention anything else. However, in the real world, a MetaFrame server can’t tell the difference between RDP connections that connect via the Web Interface and RDP connections that connect via the standard Remote Desktop Connection client. Therefore, the server has to “charge” you either way.
In the real world, this probably will not affect too many people, since most people who spend the money for Citrix choose to connect via ICA to get the most value out of their investment.
However, it’s important to understand this new licensing change. Even though RDP sessions don’t use the advanced Citrix features, you pay for them as if they did.