You cannot install the Terminal Services CAL pack on Windows Server 2003-based or Windows 2000 Server-based computers

Symptoms
When you try to install the Terminal Services client access license(CAL) pack on a Windows Server 2003-basedor a Microsoft Windows 2000 Server-based server, you may receive the following error message:

Licensing Wizard was unable to install the client license key pack. Please verify your entry and try this operation again. Message Number 0x13A7.Note The message number may also be 0x13A4 or 0xFA1.
The following event ID error message may be logged in the application event log:
Event ID: 41
Source: TermServLicensing
Description: Can’t initialize policy module because of error ‘Missing Policy module registry entry for product Microsoft Corporation, company 004′
Resolution
This problem may occur for one or more of the following reasons:Cause 1: You are trying to install a Windows Server 2008 CAL pack on a Windows Server 2003-based license server.Cause 2: You are trying to install a Windows Server 2003 CAL pack on a Windows 2000-based license server.Cause 3: The Terminal Services Licensing component is corrupted or missing.Cause 4: The Terminal Services registry key has incorrect settings.

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