Can I install 2008 TS CALs on my 2003 or W2K TS Licensing Server?
Since the release of Windows 2008, you cannot buy Windows 2003 TS CALs anymore. But when you try to install 2008 TS CALs on a 2003 or W2K TS Licensing Server, you get an 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. and a reference to this KB article: 839878 – You cannot install the Terminal Services CAL pack on Windows Server 2003-based or Windows 2000 Server-based computers Unfortunately, the article is not complete / correct in it’s description of how you should resolve the problem. In stead of upgrading your TS Licensing Server to an 2008 TS Licensing Server, you can simply use your downgrade rights. This is done by calling the Clearinghouse, who will reissue your license pack for installation on your TS Licensing Server. KB article 839878 describes this for a similar situation with 2003 TS CALs on a W2K server, but fails to mention that this also applies to 2008 TS CA
