Citrix Support >> You Do Not Have The Proper Encryption Level.. When Logging On To a Windows 2003 Server
Citrix support recently released a new CTX article discussing the error, when logging on to a Windows 2003 Server, the following error message is received:
“You do not have the proper encryption level to access this session.”
To resolve this issue please check if you have an encryption policy in place. Open the Group Policy Editor and go to Computer Configuration -> Administrative Templates > Windows Components > Terminal Services > Encryption and Security.