Win2K Terminal Connections like to munch CALs permanently. This is by design. I pasted in a piece below from TechNet that tells how to release them if they're all taken. There is also a post-service-pack-2 patch that suppossedly resolves the munching of further CALs on TechNet. If you post your e-mail address I can send it to you. When I do an install, I also take the further precaution of backing up the 'LSERVER' directory on the license server. That is where TSCAL database resides.
-gbiello
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To resolve this problem, customers need to contact the Microsoft Registration Authority and Clearinghouse. To contact the Registration Authority and Clearinghouse, call 1-888-571-2048 (in the United States). To contact the Registration Authority and Clearinghouse outside of the United States, obtain the phone number by country. To do this:
Start the Terminal Services Licensing tool.
Right-click you License server, and then click Properties .
Click Connection Method , and then click Set to Telephone .
Select the appropriate country, and then click OK.
On the Action menu, click Install Licenses , and then click Next .
Call the appropriate Customer Service Center using the telephone number displayed.
Click Cancel to close the Terminal Services Licensing tool.