Do 2008 TS CALS work with TS 2003

Am new to TS so built 2008 Terminal Server and also licenced 50 cals on another 2008 server activated a licence manager.  Worked ok but due mainly to politics regarding a couple of application issues and the fact we are to remain on XP for a while and users are familiar with it I have had to rebuild the Terminal Server with 2003 R2.  
My question is will the 50 cals which were bought for 2008 still be valid or will I have to downgrade them if possible or purchase 50 new ones for 2003.
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nchtAsked:
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JoWickermanConnect With a Mentor Commented:
Hi

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 CALs.

http://www.microsoft.com/windowsserver2008/en/us/downgrade-rights.aspx

Hope this helps.

Cheers.
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nchtAuthor Commented:
Cheers Jo, Thanks for the early reply.
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