When testing, attempt to create an RDP connection after removing the MSLicense key in the registry as a user (no Domain Admin or Power User Group) the RDP connection also fails. Insufficient permissions are being applied to the Microsoft license key in the registry for the Authenticated Users group. The Event Log does not specify the client device that provided the invalid license. When connecting with a Citrix ICA Client after downloading a Remote Desktop Protocol (RDP) web client, the RDP client might not exhibit any issues and continue to connect.

For more information, contact Microsoft Technical Support and verify that your Windows 2003 Terminal Licenses are activated. If the workstation is not enumerated, then this issue is on the Windows OS level. Investigate the Microsoft Terminal Services License manager to see if the workstation is enumerated.

When there is insufficient permissions to the following registry key, connection failures occur. Note: Windows XP Professional workstations do not have built-in CALs with respect to Windows 2003 Terminal Server License Servers. With Microsoft (both regular Client Access License (CAL) and Terminal Services CAL) licenses, before an ICA connection is established (the GINA logon pop-up), the client license must be confirmed to exist and be valid. The terminal service client has provided an invalid license.ĭescription: Unable to acquire a license for user name, domain name.įor more information, see Microsoft TechNet articles - TS Licensing Step-by-Step Guide and Troubleshooting Terminal Server Licensing. Users attempting to connect to a XenApp server might experience the following Terminal Services related errors in the Event Log: This article contains information on troubleshooting 10 Terminal Server licensing errors.

Terminal server licensing