Error: The remote session was disconnected because there are no Terminal Server client access licenses available for this computer. Please contact server administrator.

Go to client's PC who is experiencing this error, then do the following:

• Start -> Run… -> type regedit, then hit Enter
• Delete the LICENSE000 folder from HKEY_LOCAL_MACHINE\Software]Microsoft\MSLicensing\Store\
• Restart the PC
• Try to connect again to the Terminal Server using RDP