Fix: "The remote session was disconnected because there are no Terminal Server License Servers available to provide a license."

Problem

In a Citrix XenApp environment the following error is displayed, even though Terminal Server License Servers and appropriate licenses are available:

"The remote session was disconnected because there are no Terminal Server License Servers
available to provide a license.
Please contact the server administrator."

Solution

Remove the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing\Store

Download and import .reg file

Warning: applying this .reg file will remove data from your registry. Please make sure you have a back-up.